This guy walks into a psychiatrist's office with a concerned look 
on his face.  "Doc," he says, "I'm worried.  It's that dream.  I'm 
having it again."

"What dream?" asked the shrink, not really paying attention.

"You know," says the man, "the one where I'm into sadism and 
bestiality and necrophilia.  Should I be worried or am I just 
beating a dead horse?"