[archrival]

Like the previous poster said it is possible your boyfriend gets off on a lot of porn,where guys are completed manually or orally.Thats his emotional connection for now.As he matures he will start to connect with you on an emotional level and will finish inside of you.
There is also the possibility that he subconsciously dreads the thought of you accidentely falling pregnant ,even though you are taking precautions.

[pretzel]

There is also the possibility that he subconsciously dreads the thought of you accidentely falling pregnant ,even though you are taking precautions.

That was my first thought also. I remember being told by my dad and me telling my own son that "it only takes one accident".