The second two are perfect, but the first one is not. 1. The first joke is a play on the word "tutor". A childish way of saying farting is "tooting". A person who "toots" could be called a "tooter". "tutor" and "tooter" would be pronounced the same way. So, if they don't fart in public, they "toot in private" aka, "a private tutor"