A redhead, a brunette and a blonde were at the gynecologist having pre-natal checkups The doctor asked the redhead: "In what position was the baby conceived ?"

"He was on top ", she replied. "You will have a boy !" the doctor exclaimed.

Then the doctor asked the brunette the same question. "I was on top ", she replied.

"You will have a baby girl. " said the doctor.

Suddenly, the blond blonde burst into tears. "What's the matter ?" asked the doc.

"Am I going to have puppies?!" the blonde asked.