Especially amusing for those who, like me, are habitually sarcastic. No, really.

Researchers Find Sarcasm Sensor

Looks like it's in the prefrontal area, right up with the area that controls empathy. At last, a use for sarcasm! Anyone who can't detect sarcasm probably has a limited amount of empathy. Hrm. Wonder if it's possible to have specific brain damage in an entire state? :D