ive posted a whole story on a topic just like this somewhere around here. have i? no. ive hurt it from zipper friction having sex with a girlfriend with my pants still on.
my old friend hurt his shit really bad once fucking his wife. hit her pelvic bone real hard, his cock turned black from the internal bleeding. ended up going to the dr for it, they told him theyd have to make an incision around it, peel the skin down like a banana and drain it or something. long story short, he left. apparently it went away on its own.