There was a blond, a brunette and a redhead waiting to see the doctor for an ultrasound. The redhead says "I'm expecting a boy, I heard if you want to have a boy you should be on the bottom during sex." Then the brunette says "I'm hopeing for a girl, I heard if you want to have a girl you should be on top during sex."

Then the blond starts crying, so the brunette and the redhead looked over at the blond and asked. "Whats wrong? Why are you crying?" The blond replied "I don't wanna have puppies!"