A woman is very distressed because she has not been married
very long, and yet her husband has lost interest in having sex.

So, she goes to see her doctor, and relays the problem.

The doctor doesn't seem worried at all and tells her that this
is nothing serious, that her husband has merely lost his animal
instincts.

The doctor tells her to crumble some dog biscuits on her husband's
cereal every morning without telling him, and little by little
this will bring out the savage beast in him. He wishes her good
luck and tells her to come back in a week with a progress report.
A week later the woman returns to the doctor, who asks how her
husband is.

"He's dead," she replies.

"Dead?" the doctor asked. "What happened?"

The woman replied, "He was sitting on the driveway licking
his balls, and I backed over him with the car."