Chloroform Napkin

Alright, you smooth-brained chucklehead, let's break this down. You're the type to ask a girl if she wants to see your stamp collection on the first date. In this 'joke,' you're on a couch with a woman. Instead of normal conversation, you whip out a napkin and ask if it smells like chloroform, a chemical used to knock people out. The humor comes from the sudden shift to something dark and potentially dangerous. It's funny because it's inappropriate and unexpected and because the question implies that the author might be up to something sinister.