"How did Tia Alice have her baby?" "The butt!"
What's great about this video is how much technical knowledge these kids have about sex and yet how little they know; like, for instance, that the vagina is not pronounced "vangina" or how the penis even gets to the vangina. What's even greater is the kid who's cool with the fact that her parents have sex but really upset by the use of the word love. "I told you, no more love!" the poppet screams again and again. "I told you, no more love!"
Just show your kids this video and call it a day.