Two farmers, Joe and Bob, lived as neighbors, but didn't like each other much. 

In 1989, there was a period of -30 degree centigrade cold and Bob and Joe had nothing to do because of it. 

So they bet a bottle of vodka who can sit out on the window ledge the longest with a bare ass. 

After two hours Bob's wife came home and asked Bob, "What are you doing?" Bob explained and she said, "Come on, you will only freeze your ass off." 

Bob refused as he wanted to win the bet. 

Then his wife got an idea. "Lets change places when Joe is looking the other way." 

Bob's Wife put on the same kind of pullover and cap and traded places with Bob. 

Half an hour later Joe's wife came home and asked him, "What are you doing?" Joe told her and said, "I am determined to win the bottle!" 

"You are crazy. Come on in." 

"Certainly not, I am already on the winning side. Bob lost his balls half an hour ago!"