Today I Found Out takes a deep dive into the history and etymology of the word "boob." The word was considered impolite when I was young, but now is one of the gentler synonyms for breasts in common use. Simon Whistler takes us through its early uses, possible origins, and its other meaning as a slang term for idiot.
This video is only NSFW if you would get in trouble for the repeated use of the word "boob" and a few of its synonyms. So it should appeal to the 12-year-old in all of us, I guess. -Thanks, Daven!
See also: How Dick Came to be Short for Richard