Robin: Okay, okay, so you're afraid that if you spend too much time alone with me, I'll turn into a mermaid?
Marshall: Yes. I mean, sure, right now, you're bald and leathery ancovered in a thick layer of blubber...
Robin: Am I blushing or...?
Marshall: ...but at some point, my stupid male brain will transform you into a foxy fish-babe singin' "Part of Your World" to my pants.