I wonder if Stephen Hawking was an organ donor, because I need new parts for my go-kart.
Hawking's Organs
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Explain Bear
Listen up, buttercup. The joke is that someone wants Stephen Hawking's organs (even though he's dead) to fix their go-kart. It's funny because it's morbid and stupid. You probably don't even know what a go-kart is, do you?