My friend, Geno (http://www.lolwithgeno.com/), told me this one the other night:
Two cannibals, father and son, are trekking through the jungle. They've been walking a long time and are extremely hungry. The son appeals to his father, "I'm so hungry, daddy."
"I know, son. I am, too. We'll find food soon," the father says.
They march on a while longer when they eventually come upon a small oasis. Tucked away among the dense trees is a pristine pond. As they admire it, a stunningly beautiful, naked, 18-year-old girl emerges from the water, Phoebe-Cates-style, water cascading off her perfectly supple breasts. The father is mesmerized until he feels something tugging at his loin cloth. He looks down to see his young son look over at the naked girl, then up at him, and say, "I'm really hungry, daddy."
The dad replies, "I know, but change of plans, son. We're going to sneak up on this girl, kidnap her, and bring her back home with us... Then we're gonna eat Mom."