People are really irrational

S: (reading over my shoulder while I look at facebook) Why is that person wearing such silly underwear?

Me: It's an ad for underwear.

S: It's got panda bears on it! Why would anyone wear that?

Me: Maybe it's party underwear.

S: That's ridiculous, why would anyone wear special underwear to a party.

Me: ...

S: (thinking) You know, you probably *could* sell party underwear. Because people are really irrational.