Why Do Men Have Nipples?

This book finally answers that age old question: Why Do Men Have Nipples? - Newsweek Health - MSNBC.com (admit it, you've wondered that your whole life!)

please answer this: Why do men have nipples?
Well, one reason is so men don’t put their shirts on backwards. There’s a longer explanation in the book. But the short version is: it is a remnant of our brief days as a woman in utero.