Comics about mathematics, science, and the student life.

XOR

First panel. Angry boyfriend: "I can't take this, you're always gaming. You need to choose: me, or your game." Girlfriend: "I choose both." Boyfriend: "Fine then. I'm leaving." Second panel (boyfriend has stormed out). Girlfriend: "You never said it was a xor kind of choice!"

This is a classic example of a precise mathematical definition that does not coincide with our typical usage.