Replying to Funny story

So I was in Health and Human Development class today and we were learning about pregnancy. Some kid had the following conversation with the teacher and I found it hysterical, so I thought I'd share:

Kid: So can sex damage the fetus?
Teacher: Well, not really, I mean the cervix acts as a barrier between the vaginal canal and the uterus, and to be perfectly honest, most men don't own a penis large enough to penetrate into the uterus anyways.
Kid: How long is the vaginal canal?
Teacher: Roughly 8", but it varies.
Kid: So it's entirely possible if one were... well-endowed?
Teacher: Well yes, I mean there are men who are large enough, but it's rare, I mean are you 8"?
Kid: That's an answer that is entirely dependant on how many women are in the classroom.
He stands up, looks around, visually counts to himself, nods his head and sits back down.
Kid: Absolutely.