Heather: I don't want to get my hair wet.
Guy: That's fine. Put it up if you want.
(Guy starts stroking his penis.)
Heather: Are you...masturbating?
Guy: Yes, I am. You DO know about sex, right?
Heather: As much as anyone else who's been to public school.
Guy: Time to take off your towel and get in the tub.