The scene: Year 7 Indonesian class, full of 13 year-old girls.
Female Student #1: "Excuse me, how do I say in Indonesian: 'My mother is 40 years old'?"
Female Student #2: "Is she 40? Your mum's a MILF!"
Me: "Er... that's really not appropriate."
Female Student #2: (mouth agape in shock) "How do you know what that word means?"
Me: "Because I'm a grown man. I'm a bit concerned that YOU know what it means."