A man was on his way to work when he stumbled upon a fetus in the middle of the sidewalk.

The man looked around, then said to it, "Are...are you a fetus?"

A young sounding voice said, "Well technically, I'm 20 years old."

The man, still dazed, replied, "How is this possible?"

The fetus said, "Well, I kind of saw an ad for being 20 years younger....."