Unfaithful Wife

A husband suspects his wife is having an affair. He needs to go on a business trip for several days, so he decides to set a trap for her. He puts a bowl of milk under the bed. From the bed springs, he suspends a spoon. He has it calibrated so that her weight on the bed will not drop the spoon into the milk. But, if there is any more weight than that, the spoon will drop into the milk and he will detect it upon his return home.

He comes home several days later. The first thing he does is reach under the bed and retrieve the bowl. The bowl is full of butter….

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你滿18歲了嗎?這是限制級的喔.小朋友不能看.
一開始我看不太懂.這跟奶油有什麼關係?
後來問了同事.他就解釋.牛奶如何變成奶油.
原來是用 churn 在牛奶上下上下移動.
最後奶油就做出來了.