I know you're mostly kidding, but I think it's really fun to teach them to talk dirty. That memory often lasts longer for me than my memory of the action itself. I particularly fondly remember teaching Molly here all the variations of key body part names. And then how a BJ does not actually involve blowing, or a job. (And then I corrected myself, because I was wrong about the job part). The way her face lit up when she understood what I meant by blowing and said the Chinese word for it was just freaking adorable. It was like the most wildly inappropriate private language tutoring ever. Miss that girl. But I digress.