Me: Carnal knowledge means sex; sexual knowledge of another person.
Student A: Doesn't the C-K in f-u-c-k stand for carnal knowledge?
Me: I don't know…..how about we move on to the next question?
Student A and all of his classmates: No! Let's look it up.
And out come the phones and computers so that they can ask Google about carnal knowledge. This can't possible end badly.