Quote from Ted in The Three Days Rule
Robin: You made your naked lady noise. Ted: What?! Robin: Whenever you see a naked lady, you make the noise. [chortles] Ted: I don't do that. Robin: Really? [flashback to Ted walking in on Lily in the bathroom:] Ted: God, sorry, Lily. [chortles] [flashback to Ted and Robin watching a documentary:] Narrator: [on TV] While the men are out hunting, the women of New Guinea's indigenous Korowai tribe wash their clothes in the river. Ted: [chortles] [flashback to Ted and Robin at an art exhibit:] Ted: [chortles] That's totally a boob.