well my boyfriend is 21... after we have sex, there is this lump ontop but a little to the side of the penis (pelvic region). this is after we did the deed and he has cummed. It pops out (about the size of a golf ball) he can push it back in no problem. Now, I am confused as to what this is weather it be a muscle issue or a sexual issue, or maybe even a hernia.. (he got one removed back in june but on the oposite side.) Please Help I am confused and worried as is he.