George Claw M.D. said:
I was just messing with you, because I love Chappelle. But it was actually part of a full stand-up show he did, called Killin' Them Softly, that aired on HBO. It wasn't on the Chappelle Show.
edit:
Was it? I watched that movie, but don't recall. I didn't care for the movie. Chappelle did have a bit about semen at every crime scene in his stand-up, too, though. That was before Superbad. And nVidiot_Whore did refer to a "comedy routine" he saw, so I assume he was thinking of Chappelle's stand-up and not a movie.