Random fact

The German word for "nipple" translates literally as "breast wart". No, seriously.

(Though since it's been lexicalised, I'd imagine that most native German speakers tend not to think of warts when talking about nipples; that is, they tend to use it as an unanalysable single-part name, much like, say, "guinea pig", which is neither from Guinea nor is it a pig, yet most native English speakers probably think of neither when they say the name unless they consciously pick it apart.)