Silly Tedd. The transformation can't 100% turn people into animals. No, I can't accept that it's just a fantasy and you'd never actually do it anyway! Shut up!
It's entirely possible that, out of everyone at the table, Sarah is the character most interested in certain, um, "activities". The janitor's closet bit is, shockingly, a Simpsons reference. Yes, I know, I never make those. For some reason, I find the idea of a janitor's closet as a secret hideaway amusing.
Commentary added Dec 30, 2014