SciShow

Why Do Men Have Nipples? (2013x195)

Ημερομηνία προβολής: Δεκ 20, 2013

If men can't nurse, then why do they have nipples? The answer has less to do with evolution and more to do with your personal development as a teeny tiny embryo. Short version: We're all girls -- at least at first. Hank explains!