A blonde, a brunette, and a redhead all went into the ObGyn office together. When they met after their check-ups, the redhead was smilling, and the brunette asked her why. "I'm going to have a baby boy," the redhead replied.
"How do you know?" asked the blonde.
"Because I was on top."
This got the brunette thinking, and she smiled as well. "I'm having a girl!" she exclaimed. Again the blonde asked how she knew. "I was on bottom," said the brunette.
The blonde started bawling. "Why are you crying?" the redhead asked.
Through her tears, the blonde replied, "I'm gonna have puppies!"