I remember when I got my puppy, a female labrador. I'd never had a dog before. I spent a couple of hours trying to remove her umbilical cord with the rubber tip of a pencil. Imagine my surprise when my boyfriend came home and saw me - it wasn't an umbilical cord I was trying to remove, it was her fanny!
I'd never seen a dog's fud before, how was I to know?!?!?