The other day, we were discussing the Zika virus, and I used the term "birth control":
Jane: "What is birth control?"
Me: "It means doing things so that a woman doesn't get pregnant after having sex."
Jane: "So, is a condom birth control?"
Me: "Yes, exactly."
Margot: "Jane, you don't even know what a condom is."
Jane: "Margot! Of course I do. I've seen The Blues Brothers."
Don's belief in the value of letting small children watch this film is yet again confirmed.