Quote from Niles in A Passing Fancy
Frasier: A quick little pick-me-up, Niles? Niles: Oh, I am exhausted. Sleeping with Daphne, I'm not getting any rest. The way she gyrates, it's like... Frasier: Stop the simile. No use in conjuring up imagery I'll only have to repress later. Niles: I'm talking about actual sleeping, you degenerate jughead.