Fleshlight Stamina Training Unit Review: A Personal Gym For Your Love Muscle

With intense texture, tightness, and suction, these pocket pussies are designed to help you last longer during sex — and we put them to the test.
collage image featuring a gold-cased fleshlight stamina training unit next to its box against a grungy, tough-looking black and white chalk illustration of muscled arms flexing, stamina and strength concept
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Updated:February 2024

Our Top Recommended Fleshlight Stamina Training Units:

Best Overall
Also Good
Budget Pick
$69.95
$69.95
$34.95
Description:

Bottom Line: With a tighter-than-tight anal opening and densely-packed sleeve texture that's unique to the Stamina Training Unit line, the STU Butt is the most intense full-sized Fleshlight imaginable — and perfect for building (or maintaining) your own unit's stamina. [Full Review + Video]

Description:

Bottom Line: Featuring the signature STU bubble-wrap sleeve texture expertly designed by Fleshlight, the Stamina Training Unit Lady offers a gorgeously molded vulva orifice that's strikingly effective for improving your stamina during partnered sex with regular use. [Full Review]

Description:

Bottom Line: Small enough to hold in the palm of your hand but featuring the same dense sleeve texture as other STUs, this double-ended stroker offers a realistic mouth and anal orifice, packing a one-two punch at about half the price of a full-sized Stamina Training Unit. [Full Review + Video]

Best Overall
$69.95
Description:

Bottom Line: With a tighter-than-tight anal opening and densely-packed sleeve texture that's unique to the Stamina Training Unit line, the STU Butt is the most intense full-sized Fleshlight imaginable — and perfect for building (or maintaining) your own unit's stamina. [Full Review + Video]

Also Good
$69.95
Description:

Bottom Line: Featuring the signature STU bubble-wrap sleeve texture expertly designed by Fleshlight, the Stamina Training Unit Lady offers a gorgeously molded vulva orifice that's strikingly effective for improving your stamina during partnered sex with regular use. [Full Review]

Budget Pick
$34.95
Description:

Bottom Line: Small enough to hold in the palm of your hand but featuring the same dense sleeve texture as other STUs, this double-ended stroker offers a realistic mouth and anal orifice, packing a one-two punch at about half the price of a full-sized Stamina Training Unit. [Full Review + Video]

Fleshlight’s Stamina Training Units are like a gym for your love muscle — combining extraordinary tightness, intense texture, and super suction inside a pocket pussy designed to help you last longer when it counts.

(Who said self-improvement can’t be fun?)

Fun Facts:

  • According to our research, men have about a 40% chance of developing erectile dysfunction (including premature ejaculation) during their 40s — and the risk increases another 10% with each decade that passes.
  • Premature ejaculation affects between 20 and 30% of sexually active men.
  • Men in our forums have talked about using delay sprays and other means to help them last longer in bed, but Stamina Training Units from Fleshlight make it possible to achieve similar results without applying a spray or cream that could potentially irritate delicate skin.

Fleshlight offers several Stamina Training Unit models to choose from:

Each is designed to enhance your overall performance by desensitizing your penis through its intense (yet pleasurable) fit and feel so that when it’s time for the real deal, you won’t blow your load as quickly.

But do they really work as advertised?

I don’t think I’ll ever be able to hold back the floodgates with my stupidly hot partner, but the Fleshlight STU does seem to help me last longer in bed — and I’ll tell you everything you need to know about the experience of using one.

Our Research, Testing & Review Methodology:

  • Fleshlight STU Requirements: Official branded Fleshlight product, tight but comfortable fit, improved stamina with use (as advertised and within reason), ease of cleaning, and user-friendly design.
  • Fleshlight STUs Considered: 6
  • Models Tested: 3
  • Tested By: Justin Perlman
  • Total Research Time: 13 hours across 3 months (as of 1/4/2024)

Our Hands-On Experience Using The STU Fleshlight

photograph of product tester justin holding a gold-cased fleshlight stamina training unit pocket pussy and stroker in his hand as part of the testing and review process

There are so many different kinds of products and methods that claim to help you last longer during sex — such as kegel exercises, edging, and even delay sprays — but the Fleshlight Stamina Training Unit (STU) line really caught my eye.

The STUs look like regular Fleshlights — if not a little more hardcore — and I was excited to see if they would strengthen my stroke game.

They were also a bit of a test for me, personally.

My partner and I used to have super long marathon sex sessions almost daily and back then, I could hold out for almost unreasonable amounts of time.

Now, it feels like I’m rocking a hair trigger downstairs — and holding back has become more of an issue as I’ve approached midlife.

We have less sex in general — we are older and life is more stressful, as many can relate — but even so, my orgasms shouldn’t be breaking a land-speed record.

So when the Stamina Training Units arrived, I was looking forward to trying these bad boys out to see if they could improve my unit’s stamina.

The first one I received was the Quickshot STU Butt/Mouth, a double-ended stroker with an oral or anal opening on either side.

Budget Pick
Fleshlight Quickshot STU Mouth/Butt
4.7
$34.95
Pros:
  • Choose Between Mouth Or Butt Openings
  • Dense Sleeve Texture Is Very Stimulating
  • Tight Fit That Isn’t Too Constrictive
  • Compact, Travel-Friendly Size
  • Super Easy To Clean & Dry
Cons:
  • No Adjustable Suction
  • Attaching The Cap For Suction Limits Insertable Depth
  • Mouth Detail Only (No Teeth Or Tongue)
  • May Be Too Tight For Girthy Penises (> 5.5”)
Bottom Line: With two orifices to satisfy whatever you’re in the mood for, this Quickshot Stamina Training Unit packs a major punch despite its compact size. The decent fit and dense sleeve texture feel amazing during use, especially with the addition of one end cap for some suction.
$31.46 @ Fleshlight –> CODE: WHI10 $34.16 @ The Enhanced Male –> CODE: WHI10

Right off the bat, I giggled at the idea of being able to safely go ass to mouth — something you can’t do quite so easily during partnered sex.

I’m not usually a fan of gold, although I did like the contrast between the casing and the bright pink sleeve insert — it certainly signaled that this was a special Fleshlight.

Overall, the Butt/Mouth Quickshot STU was fine.

I enjoy getting blowjobs, so seeing the mouth Fleshlight in action was a nice visual touch during use, but overall, it didn’t provide the grip I had imagined it would.

That certainly changed when I tried the full-sized Fleshlight STU Lady and STU Butt.

Also Good
Fleshlight Stamina Training Unit Lady
4.7
$69.95
Pros:
  • Incredibly Tight Orifice, Pretty Vulva
  • Densely Packed Sleeve Texture
  • Crazy Strong Suction
  • Designed To Desensitize Your Penis (Somewhat)
  • Regular Use Could Help You Last Longer In Bed
Cons:
  • Might Be Too Intense For Daily Use
  • May Take Longer to Clean and Dry
  • Monotonous Sleeve Texture
Bottom Line: Built with fun and function in mind, the STU Lady features a perfectly pink pussy that invites your entry into a masturbation sleeve designed to help you last longer during partnered sex. Packed with an intensely tight texture that’s a bit monotonous (but still exciting), this gal’s job is to desensitize your bits — and she does it in style.
$59.39 @ The Enhanced Male –> CODE: WHI10 $62.96 @ Fleshlight –> CODE: WHI10

Both of these Stamina Training Units offered an incredibly tight fit without being uncomfortable.

Best Overall
Fleshlight Stamina Training Unit Butt
4.8
$69.95
Pros:
  • Incredibly Tight Anal Orifice
  • Densely Packed Sleeve Texture
  • Crazy Strong Suction
  • Designed To Desensitize Your Penis (Somewhat)
  • Regular Use Could Help You Last Longer In Bed
Cons:
  • May Take Longer to Clean and Dry
  • Monotonous Sleeve Texture
  • Anal Orifice Might Not Be Sexy To Everyone
Bottom Line: If you want to beat your meat into submission so it can come back stronger than ever, you need to check out the STU Butt. This purpose-built Fleshlight sleeve uses tightness, dense texture, and intense suction to help desensitize your most sensitive parts so you can last longer in bed.
$59.39 @ The Enhanced Male –> CODE: WHI10 $62.96 @ Fleshlight –> CODE: WHI10

Comparing the STU Lady to the STU Butt, the latter felt slightly tighter at the opening — and in fact, we ranked it as the tightest and most intense Fleshlight available — but the difference between them was otherwise small.

The sleeve texture of every STU Fleshlight is the same and although it isn’t as intricate or varied as some other models, that didn’t make them any less pleasurable.

The round nodules are so tightly packed inside the sleeve that it feels like firm, sexy bubble wrap, and once the suction hits — dude — these things go.

The combination of the texture and the extra tightness that came along with the suction was an absolute knockout — and I was finished off rather quickly.

The Stamina Training Unit Fleshlights feel great, but have I noticed any improvement in my performance?

photograph of product tester justin holding the fleshlight stamina training unit butt in his hand with an inset image of the vulva/lady version of it and its internal texture in the upper right hand corner

It is hard to say since I don’t keep a stopwatch near my bed, but I think overall it has helped — with one caveat.

The Fleshlight STUs did bolster my penis’s vulnerability to sensation, but partnered sex is more than just penile pleasure.

Not to brag, but my partner is incredibly sexy — looking into her eyes, feeling her body against mine, and hearing her voice is really what makes me wrap things up in a jiff.

After I first began using the STUs, I wasn’t sure if they were doing anything much for me until one night, we were traveling and boned in a hotel with excellent light blocking.

It was pitch dark so I couldn’t see a damn thing, but I could still feel and hear her.

The sex felt incredible — as it always does — but I had more stamina and lasted way longer, even with my partner’s exciting touch and sound still in play.

I don’t think I’ll ever be able to hold back the floodgates entirely (as I said, my partner is hot), but the Fleshlight STU is actually helping to improve my personal stamina.

I have used other methods to help keep my loads at bay in the past, but I’ve never been a huge fan of numbing agents or edging.

In my experience, anything that hampers sensation in the moment often swings too far in the wrong direction — murdering my erection entirely.

Desensitizing lubes, creams, or sprays can also be irritating if you’ve got sensitive skin.

Edging can delay orgasm, but I’ve always found it difficult because I’m impatient and have little impulse control.

There are a lot of ways to improve your sexual endurance, but the Stamina Training Unit from Fleshlight is definitely my favorite.

Thanks to the tightly packed texture, it does take a bit longer to clean and rinse the sleeve insert thoroughly.

And compared to other models, it took an extra 20 minutes to dry using the Fleshlight Air.

That’s a minor “inconvenience” considering what the STUs offer in return: improved stamina and orgasm delay without the need for irritating numbing creams or sprays.

What Is The Fleshlight STU?

photograph of product tester justin holding the fleshlight stamina training lady pocket pussy in one hand and its box in the other while making a playfully curious frowny face

The Fleshlight Stamina Training Unit (STU) is a line of branded pocket pussies with a densely-packed sleeve texture that’s purposely designed to provide more stimulation compared to the average male masturbator.

The theory behind the STU Fleshlight is that overstimulation will decrease penile sensitivity over time so you can last longer during partnered sex.

As of this writing, there are six STU models available:

How Does The Fleshlight STU Work?

Although it works similarly to any other Fleshlight — remove the cap, apply the lube, insert your penis, and stroke at will — the STU is like resistance training for your sexual stamina.

You engage in a more extreme version of an activity — masturbating with an intense pocket pussy, in this example — so the average version feels less stimulating.

Through an expertly crafted combination of tightness, suction, and texture, a Fleshlight Stamina Training Unit decreases penile sensitivity over time with repeated use.

That way, when you have sex with a partner, you won’t be so overstimulated that you pop before you want to stop.

How Do I Use The Fleshlight STU?

The basics of using the Fleshlight STUs are just as simple as using any other Fleshlight:

  • Apply water-based lube to the orifice, dripping some through the sleeve (you might spread it around with your fingers for better coverage), applying the same lubricant to your penis if desired
  • Unscrew the end cap for easier entry (full-size or compact GO versions, only)
  • Insert your penis, closing the cap to adjust suction
  • Stroke by hand — and don’t be surprised if you climax quickly
  • After you’re done, remove the sleeve and rinse out the inside thoroughly, using FleshWash to clean it if you have some on hand
  • Rinse again
  • Dry the inside, noting it may take more time compared to other Fleshlights
  • Sprinkle Renewal Powder to keep the sleeve’s material feeling brand-new
  • Store it away for future use

The point of a Stamina Training Unit is to use it regularly, which will help to desensitize your penis and delay ejaculation during partnered sex.

An STU may be too intense if you’re just looking for a leisurely Fleshlight session.

If your goal is to improve your sexual stamina, however, using an STU a few times a week should be enough to start noticing results.

Fleshlight Stamina Training Unit Top Features

You could think of Fleshlight STU as a pocket pussy cranked up to 11, and there are some noticeable features to point out.

Here are the top features of the Fleshlight STU:

  • Intense Tightness And Suction
  • Densely-Packed Texture
  • Functional Fun
  • The SuperSkin Sleeve
  • Special Gold Casing

Intense Tightness And Suction

photograph of product tester justin feeling the internal texture of a gold-cased fleshlight stamina training unit pocket pussy to test the tightness and suction

Normally, I would separate these two features — tightness and suction — but they work with such harmony that it is hard to not think of one without the other.

The Fleshlight STU already rocks a gorilla grip, but the suction draws the walls in even closer for a surprisingly sexy squeeze.

It goes the other way, too.

The tightness creates a more intense vacuum that increases the sucking sensations.

Talk about a one-two punch.

Densely-Packed Texture

photograph of product tester justin holding the fleshlight stamina training unit butt box to display the design of its sleeve which features a series of tightly-packed nodules throughout, making it the most intense fleshlight sleeve there is

While other Fleshlights may have intricate and almost labyrinthian interiors, the Stamina Training Unit drops finesse for power.

The walls are densely lined with round, soft nodules that tickle and stroke your shaft and head for an overwhelming amount of sensation.

Combine that with the aforementioned tightness and suction and it is easy to see why this device will help you last longer in bed with regular use.

Functional And Fun

photograph of product tester justin holding the fleshlight quickshot stamina training unit mouth/butt combo stroker in his hand to show its small size from end to end

Besides the benefit of helping you to keep the party going with your partner, the Fleshlight STU just feels great.

It’s nice to have a sexual wellness device that is as much of a thrill to use as it is helpful.

Even if you aren’t looking to lengthen your play time and just enjoy a tight and intense masturbation sleeve, this one is for you.

Soft SuperSkin Sleeve

photograph of product tester justin holding the fleshlight stamina training stu lady in his hand with the vulva orifice facing the viewer to display the superskin material the sleeve is made from

While all Fleshlights are made with the patented and legendary SuperSkin material, the Fleshlight STUs really benefit from it here.

The idea of training to last longer through overstimulation can backfire.

If you are going too hard or the material isn’t soft enough, the whole experience can become uncomfortable.

With the proprietary SuperSkin, everything feels soft and smooth — especially with Fleshlight lube applied — and it feels about as close to the real thing as you can get.

Speaking of realism, the Fleshlight Sleeve Warmer adds a human-like temperature to the sleeve that will blow your mind.

Special Gold Casing

photograph of product tester justin looking at a fleshlight stamina training unit model in his hand, admiring the gold case that surrounds the superskin sleeve

I am a sucker for audacious aesthetics, and the gold case delivers.

Not only does it look groovy with the pink sleeve inserts, but it also adds an element of importance to the device.

It’s saying “This is the gold standard for sexual stamina training so let’s get down to business” and backing those claims up on a visual level.

The Pros And Cons Of The Fleshlight STU

photograph of product tester justin holding the fleshlight stamina training unit butt to display its very tight orifice to the viewer

Fleshlight Stamina Training Units are awesome, but they’re not perfect for everyone, or every situation.

Fleshlight STU Pros

Fleshlight STU Cons

  • Might be too intense if you’re just looking for a relaxing wank
  • Takes a bit longer to clean and dry
  • The sleeve texture is powerful but monotonous
  • The STU Quickshots may be too tight for girthy penises, as these are the smallest Fleshlights available
  • The STU Quickshots are open-ended on either side and don’t provide the same suction as the GO or full-sized versions as a result

One thing I do want to stress is that the Fleshlight STU can help desensitize your penis, but that is only one part of the equation.

If you are looking for a fuller approach to withholding or delaying ejaculation while still having fun, try ramping up your other senses while using the STU.

You can do this by watching point-of-view (POV) or virtual reality (VR) porn with the volume on, or using pillows or the Fleshlight Liberator so you can hump instead of stroke.

You can also try pairing your STU with its appropriately-sized Fleshlight Launch so you have less control of the action.

The Universal Launch accommodates the full-sized and GO versions of the STU Lady or Butt, while the Quickshot Launch should be used with the STU Butt/Mouth or Lady/Butt Quickshots.

Is The Fleshlight Stamina Training Unit Safe?

Yes, using a Fleshlight Stamina Training Unit is safe but just as with any other model, there are a few things to consider:

Fleshlight STU Vs. Others

Stamina Training Units
Base Price
Options
Adjustable Suction
Size
Launch Type
Stamina Training Units
Options
Vulva, Anal
Vulva, Anal
Vulva/Butt, Mouth/Butt
Adjustable Suction
Yes
Yes
No
Size
Accommodates 8-9” length, 7.5” girth
Accommodates 7-8” length, 6.5” girth
4”(open-ended), accommodates 4.5” girth
* All Fleshlight Stamina Training Unit models feature an identical internal sleeve texture crafted from pink SuperSkin material and housed in a signature gold-colored plastic case.

 

So, how does this Fleshlight compare to other models?

Let’s take a closer look:

  • Fleshlight STU is made for the purpose of improving your stamina, whereas others are just a good time.
  • STUs are tighter than most models with stronger suction and a much more densely-packed sleeve texture.
  • The inside of any Stamina Training Unit sleeve is not as varied or ornate as other Fleshlights.
  • The gold casing really stands out — and that also makes it easy to discern which one to grab if you own multiple Fleshlights.

The Fleshlight STU is not just for pleasure, but also for purpose.

It is a wild ride and great for fans of tight Fleshlights, but it is also the only kind that serves a function that goes beyond getting your rocks off.

Why Trust Our Review

Our only goal is to give you the best information possible for your sexual life journey.

We rely on dedicated research, hands-on experience, and honesty.

I have spent dozens of hours testing different Fleshlights over several months.

I’m also very open about what works for me, what doesn’t, and why.

Finally, my own experience is further backed up by a team of researchers and product testers who reached a consensus with me.

We are not here to sell based on the highest commissions — rather to inform consumers of the best recommendations based on our lived experience.

Closing Thoughts

For those of us who struggle with our sexual stamina, the Fleshlight STU is an excellent line of sex toys that are as helpful as they are enjoyable.

Best Overall
Also Good
Budget Pick
$69.95
$69.95
$34.95
Description:

Bottom Line: With a tighter-than-tight anal opening and densely-packed sleeve texture that's unique to the Stamina Training Unit line, the STU Butt is the most intense full-sized Fleshlight imaginable — and perfect for building (or maintaining) your own unit's stamina. [Full Review + Video]

Description:

Bottom Line: Featuring the signature STU bubble-wrap sleeve texture expertly designed by Fleshlight, the Stamina Training Unit Lady offers a gorgeously molded vulva orifice that's strikingly effective for improving your stamina during partnered sex with regular use. [Full Review]

Description:

Bottom Line: Small enough to hold in the palm of your hand but featuring the same dense sleeve texture as other STUs, this double-ended stroker offers a realistic mouth and anal orifice, packing a one-two punch at about half the price of a full-sized Stamina Training Unit. [Full Review + Video]

Best Overall
$69.95
Description:

Bottom Line: With a tighter-than-tight anal opening and densely-packed sleeve texture that's unique to the Stamina Training Unit line, the STU Butt is the most intense full-sized Fleshlight imaginable — and perfect for building (or maintaining) your own unit's stamina. [Full Review + Video]

Also Good
$69.95
Description:

Bottom Line: Featuring the signature STU bubble-wrap sleeve texture expertly designed by Fleshlight, the Stamina Training Unit Lady offers a gorgeously molded vulva orifice that's strikingly effective for improving your stamina during partnered sex with regular use. [Full Review]

Budget Pick
$34.95
Description:

Bottom Line: Small enough to hold in the palm of your hand but featuring the same dense sleeve texture as other STUs, this double-ended stroker offers a realistic mouth and anal orifice, packing a one-two punch at about half the price of a full-sized Stamina Training Unit. [Full Review + Video]

Even if you don’t feel the need to work on your stamina, the Fleshlight STUs are just damn good pocket pussies.

Sexual self-improvement never felt so good.

Editor’s Note: This article is part of our Complete Guide To Fleshlights and Everything Fleshlight hub, in-depth and evolving resources that comprehensively explore and review all aspects of Fleshlights from the company’s discreet billing and shipping, to the types of products they carry, how to use them, materials, and safety.