Professor: Suppose a woman goes in for a haircut. No, that's not right! What are they called if they're for women? Blow-something. Blowjobs?
http://www.overheardatmcgill.com/archives/2008/11/01/a-guy-walks-in-and-asks-for-just-a-little-off-the-top/
Overheard by: econ 208