Because their horns don't work.
There were two cows in a field. The first cow said "moo" and the second cow said "baaaa." The first cow asked the second cow, "why did you say baaaa?" The second cow said, "I'm learning a foreign language."
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The letter H.
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"Pint please, and one for the road."
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None, because people who glow in the dark don't need light bulbs.
Note: Topical to the Chernobyl Reactor disaster of 1984.
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Just one, but he/she will spend hours checking for technical problems.
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Can I have your hand, hand, hand, hand, hand, hand, hand, hand in marriage?
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