In Paris our professor is, well, himself. Drunk at dinner, flirting with girl students, ironically needling my girlfriend and her mother who's joined for a day. "Do you two ever lie to each other?"

They must. At the end of the evening they went to reserve a room with a double bed, not for girlfriend and mother, but for girlfriend and me; and somehow mother was not supposed to know.

"The two of you are very dangerous," he says, with a smirk.