Reminds me of one of my favorite jokes...
One day a little boy is at the store shopping with his mom. Suddenly, he decides to look up a manican's skirt. His mom snatches him up and says, "DO NOT go near that area on girls, they have teeth down there."
So the little boy grows up still thinking this. One day in high school, the boy and his girlfriend are making out. The girl is hot and bothered and says, "don't you want to do more?" The boy is confused and asks what. The girl grabs his hand and puts it between her legs. The boy freaks out and says "no, my mom done told me about you women, ya'll got teeth Down there". She says "no i don't". He says, "yes you do". They go back and forth until finally, the girl flips out, pulls down her panties, throws her legs behind her head and yells, "SEE, I DO NOT HAVE TEETH DOWN THERE!" The boy nervously takes a look and responds. "No wonder you aint got no teeth, look at the shape your gums are in"