On a Deserted Island
A guy is stranded on an island with only a Doberman and a pig for company. There's plenty of food and water, and the weather is beautiful, so he's doing alright -- but after a few months he starts to get "lonely", if you know what I mean.
With each passing day, the pig becomes more and more attractive to him: soft, pink flesh, round buttocks, etc. But every time the guy makes an advance towards the pig, the Doberman snarls at him and once almost bit his leg.
One day the guy sees a speck on the horizon, so he swims out to it. As he gets closer, he sees that it's a boat! He swims closer... closer... until finally he comes upon a small dinghy. He climbs over the side and finds in the bottom of the boat is a beautiful woman, unconscious.
He drags her to shore and brings her into his hut and overa period of several days he nurses her back to health. Finally she's well enough to walk and she says to him, "Thank you, thank you for saving my life. I don't know how I can ever repay you. I'll do anything for you. Anything! Just name it."
The guy thinks for a minute and asks, "Would you mind taking my dog for a walk?"