When it comes to sex, the analogies between rats and humans are “profound,” said James G. Pfaus of Concordia University in Montreal. “It’s not simply instinctual for them,” he said. “Rats know what good sex is and what bad sex is. And when they have reason to anticipate great sex, they give you every indication they’re looking forward to it.”OK. Are we talking about going through the Kama Sutra here? What exactly is "good sex" to a rat? Hat tip to Pam on Myspace for the link.