Guy 1: Aww, dude, I can't stop getting erections from looking at my tutor.
Guy 2: Just do what I do and think of Rosie O'Donnell.
Guy 1: Thanks, man!
One week later...
Guy 1: Oh shit, man! You're the best! Rosie O'Donnel is so fugly
I didn't get an erection for a whole week!