Transferable skills.
Professor Smith: I am actually able to feed a banana to a child in the back seat while driving.

Professor Smith: I've got a nice big OED sitting on my desk. It's there, gathering dust. It's what's referred to as "shelf candy".

Professor Smith: It is at this point that we cease to see you as our students, and us as your teachers. We are now colleagues in a shared intellectual endeavour. (...) Except that I get paid.

Professor Smith: I'm not allowed to choose my clothes anymore. That stylistic choice was closed for me after I got married.