Saw a 14 year old girl today for a physical. After the full dog and pony show, I was wrapping up. Mom asked me to peek at a spot that they had forgotten to mention, on her abdomen.
Eesh. A supernumerary (extra) nipple.
These are of course commonplace, and of no consequence.
Unless you're a 14 year old girl.
I wasn't sure how she'd take it. I had the forethought to clap my hands over her 11 year old brother's ears before whispering "It's an extra nipple."
She not only thought it was hilarious, I got big points for keeping it from her brother. I'm guessing that kind of info is major currency in the sibling wars at her house.
If supernumerary nipples aren't further evidence of evolution, I don't know what is.