I just saw this on Overheard in New York (great site — always makes me smile!) and had to post it:
Cafeteria lady: So, you been good this weekend?
Frat boy: No! Me and my girlfriend got totally shit-faced!
Cafeteria lady: ‘My girlfriend and I.’
Frat boy: What?
Cafeteria lady: ‘My girlfriend and I got totally shit-faced.’
Frat boy: Whoa! You have a girlfriend?! Hardcore!