UCSB researchers John Tooby and Leda Cosmides just came out with a study disproving the last legs of Freud’s runaway theory on incest, the game the whole family can play. According to their research, the taboo hanging over your hot sister’s head has less to do with societal forces and more to do with evolutionary factors.

As is to be expected, the intelligent design folks are fuming over this “evilution” explanation, and are currently rallying to break down the wall between science and their sense of a good time.

Thursday’s Forecast: The ‘human discovers that keeping it in the family sucks for your mom.