Ole married an attractive woman, Lena, half his age. After several months, Lena complained that she had never climaxed during sex; and according to her Grandma, all Norwegian farm women are entitled to a climax once in a while.
To resolve the problem, they went to see the large-animal Vet since there was no trustworthy doctor anywhere in Mower County, Minn. The Vet didn't have a clue, but he did recall how, during the hot summer, his Mother and Dad, Olga and Sven, would fan a cow that was having any difficulty birthing a calf to cool her down and make her struggles easier.
The Vet told them to hire a strong, virile, young man to wave a towel over them while they were having sex. This, the Vet said, would cause the young wife to climax.
So the couple hired a young man from the big city of Minneapolis named Lars to wave a towel over them as the Vet suggested. After many efforts, and still no climax, they went back to the Vet. The Vet said for Lena to change partners and let Lars have sex with her while Ole waved the towel.
They tried it that night and Lena went into wild, screaming, ear-splitting climaxes, one after the other. When it was over, Ole smugly looked down at Lars and said, "Ya see, city slicker, now THAT's how ya wave a towel!"