I have had anal sex before and I promise it does not make your butt bigger. It does hurt at first but after a while its not so bad. Its definally not something I like to do all the time though!! Also keep in mind, your vaginal muscles are stretched during sex. Well, so is your anal wall during anal sex....believe me I have seen the affects of too much anal sex (I work in healthcare). These muscles do weaken too, and just the same as women some times having leaky bladder problems because of weakened muscles. It can happen in the anus too!!
