South Park: Bigger, Longer & Uncut (1999)

Continuity mistake: During the "La Resistance" number, during the verse, "They may stab you in the head, with a dagger or sword," We see a guy wearing blue with a blue hat on the left (probably Craig). In the next shot, he disappears, and in the next shot, he reappears. (00:50:05)

Mrs. McCormick: Where do you think you're going?
Kenny: [Muffled.] I'm off to see a movie.
Mrs. McCormick: You can't, you have church!
Kenny: [Muffled.] But mom, I want to see the movie.
Mrs. McCormick: Well fine, go ahead and miss church! And then when you die and go to hell, you can answer to Satan!
Kenny: [Muffled.] OK.

Trivia: This cracks me up every time I see it. If you think Satan is really cut have a close look at his abs. They are in the shape of a big penis. (00:27:55)

Question: When Cartman says he saw Kenny, Kyle says he sees Kenny everyday, on the face of every child, on the smile of every baby and he and Stan starts laughing. What does the joke mean?