"Of course I want to join. That was fantastic!" you say, grinning.
"Very well, since you're laying on your front I'll begin the exam back here." She says, moving around behind you.
"Pardon? What do you me..eeeAAAAN!" you gasp as the nurse plunges a hand up your rump. "What are you doing?" you gasp.
"Swallowing isn't the only method taught here, and even if it were you will have to cope with huge amounts of bodily waste." she says, plunging her other hand into your rear and trying to stretch you.