Dad, when did you lose your virginity? To whom? (And yes, my son would say “whom.” We are raising him right.)
Dad, have you ever had sex with a prostitute?
Dad, have you ever cheated on Mom?
Dad, has Mom ever cheated on you?
I asked the first two of these questions of my father. My parents separated when I was four, so the last two were of significantly diminished interest to me.