Why does a guy's penis hurts while he is having sex?
for real because i don't know what you are talking about. if his stuff hurts then it could be for any number of reasons. if your stuff hurts then yall' probably need more foreplay.
the obvious question is....were you rough with it? some guys have a really wimpy penis and it cant take much.
His penis hurts or you hurt? If he hurts he should go see a doctor.