"Who was the first person" joke

Who was the first person to look at a cow and say,
"I think I`ll squeeze these dangly things here, and drink whatever comes out?"

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Why is there a light in the fridge and not in the freezer?

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Two cows standing next to each other in a field, Daisy says to Dolly,
"I was artificially inseminated this morning."
"I don`t believe you," said Dolly.
"It`s true, no bull!" exclaimed Daisy.