ok, i dont know if there is a thread on this or not im just curious awhile ago, me and a friend were talking about her boyfriend at the time who is well endowed, she said that in the middle of fucking one time, his cock made a popping noise like a knuckle being popped. she said it scared her to deat and she thought she broke it i thought she was lieing till one time i was going down on my man (who is also well endowed) and *pop*! it scared me! i kept asking him if he was alright and he said yea he didnt really feel it but he could tell it happened.. so, my question is, has this ever happened to any of you or does you cock pop? and why does it do it?