Why does my boyfriends penis peels after sex?

Sounds like you have an acid inside of you that does this to him . and some times this will happen when you have Chemical Reactions from body fuilds, some times its just this away . and it might be what you eat. and your body changes this food into , some acid , that is really diff from his, but you should be checked out to answer this question , the penis tip is very tender, and will react from diff body acids, if really strong in their state, ive known people who eat hot peppers , and the husband or boyfriend, end up thinking they had an STD. but come to find out , it was the hot peppers , that tranformed into a strong acid, inside the womans body, causeing the penis tip to blister, and turn really red, so go to the doctor and tell him what has happened , and boyfreind needs to go also, so you both know you are healthly!

Perhaps he is allergic to latex or the lubricate used.

Does sound like he is reacting to the condom he may be using because it makes much more sense. That is the first thing i would check on since you, the girlfriend, does not have any kind of reaction from the direct contact.

That happened to me, my doctor took swabs on and around my penis head and the shaft, but what it turned out to be was her deoderant that she sprays on her fanny to keep dry the stiffness of her pubic hair took the skin off the top of my penis.