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.