"Teaching arrangement? You kinky minx! And I can do a work-up on you if you'd like. Go pee in this cup," she leans into a cabinet and grabs a sterile device. "and try not to get any on the outside because I still have to touch it when you are done. While you're in the bathroom, why don't you come up with whatever sex mataphor you'd like me to use when I ask the embarassing questions."