Where do babies come from

A teenage girl comes home from school and asks her mother. "Is it true what Rita just told me? Babies come out of the same place where boys put their penises?"

"Yes, dear," replies her mother, pleased that the subject had finally come up and she wouldnt have to explain it to her daughter.

"But then when I have a baby," the teenager pondered, "wont it knock all my teeth out?"