Ole is a farmer in Wisconsin who needs a new milk cow. He hears about a nice one for sale over in Minnesota, so he drives to Minnesota, looks at the cow, and reaches under to see if she gives milk. When he grabs the teat and pulls, the cow farts. Ole is very surprised, so he looks at the farmer who's selling the cow, then reaches under the cow to try again. He grabs another teat, pulls, and the cow farts again. But milk comes out, so after some discussion, Ole decides to buy the cow and takes it home. He calls his neighbor, Sven, over 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, "I bet you bought dis cow in Minnesota, yah?" Ole is very surprised and says, "Yah, dats right. But how did you know?" Sven says, "My wife is from Minnesota."