My 12 year old daughter said basically the same thing last week. She's had the talk already with the wife, but came home from school with some idea that we'd only had sex twice. The wife and I - with gleeful grins - said "uh, no". The wife continued: "People can do it for pleasure." "Do you two, uh...?" said the daughter. The wife and I look at each other, nod. "GROSS!"