Story: A friend of mine (who is 20 now) used to wear "tighty whitie" or briefs style underwear for most of his childhood. In fact, he wore this style of underwear for at least the first 11 years of his life. Then he finally moved into boxer briefs and boxers etc. Now, this friend, in his youth, had a long penis. And his penis was so long that when he wore briefs, his penis would extend from his body, wrap around the front of his sack and the head would rest underneath his scrotum. Sometimes this friend would have spontaneous erections while he was wearing these briefs and his erections were trapped in that position. As I first viewed my friend's penis about a month ago, it has a downward curve. Question: Was this downward curve in his penis caused by him wearing briefs for so long? Are penis curves caused by genetics, or physical means? And are there ways to "re-bend" the penis?