Ole is a farmer in Indiana. He is in need of a new milk cow and hears about one for sale over in Nordakota (that would be North Dakota for you non Scandhoovians out there).
He drives to the Nordakota farm and looks over the cow. Ole reaches under to see if she gives milk. When he grabs the teat and pulls.. the cow farts.
Ole is very surprised. He looks at the farmer who is selling the cow, then reaches under the cow to try again. He grabs another teat, pulls, and the cow farts again. Milk does come out however, so after some discussion with the cow's owner, Ole decides to buy the cow and take her home.
When he gets back to Indiana, he calls over his neighbor, Sven, and says, "Hey, Sven, come and look at dis here new cow I yust bought. Pull her teat, and see vat happens."
Sven reaches under, pulls the teat and the cow farts. Sven looks at Ole and says, "You bought dis here cow in Nordakota, didn't yah?"
Ole is very surprised since he hadn't told Sven about his trip. Ole
replies, "Yah dats right. but, how did you know?
Sven says, "My wife is from Nordakota."