Rectal Intercourse

We learned in histology today why rectal intercourse is not as great as it was made out to be.

Your anal canal is what meets the outside, and has nice thick layers of cells that prevent HIV and other bugs from invading your body. Now, one inch into the colon...you get to the rectum. Now, that is only one cell layer thick. I would imagine it is easier for HIV to cross that than...let's say through regular vaginal intercourse. So that's a no-go fellas.

The whole time, the professor kept interchanging "rectal intercourse" with "butt @#$(."

Oh he knows what he is doing. Every time he uses the colloquial, he immediately follows with, "that's not funny!" You can imagine how hard it was for the class today to maintain composure.