Today I learned that if people are wearing upside-down pineapple jewelry, or have upside-down pineapples printed on their shirts, or are even just carrying an actual pineapple upside-down, it's a sign that they're swingers and looking to hook up. (This probably would have been equally apropos in the "WTF" thread.) Now that I know this, I'm going to be looking for it everywhere; not because I'm interested, just curious if some perverted cabal has been right under my nose my entire life.
Also, that's very specific; who the hell came up with THAT as their "secret handshake??" Is it because that's how you'd hold it if you're about to... shove it... up... someone's...?!?