My mom told me, decades ago, that when she was in high school, the belief was that a man's shoe size was proportional to the size of his penis. So, the fashion was for boys at the HS to wear shoes that were several sizes larger than what they really needed. Must have been quite a sight when they were running up the stairs...

Flash-forward: I was riding the subway home from work one evening, sitting next to two teenaged girls who were discussing the Guiness Book of Records. One described the world's tallest man (8'11") to the other. "Really? Was he married?" the other asked. "No, couldn't be," the first one said. They lowered their voices, but I kinda leaned in on the conversation. She said, "A man's thing is the same as his shoe size--and that guy wore a size 36 shoe."