Flat Earther Pickup

Alright, you simpleton, listen up. A flat-earther is someone who thinks the Earth is flat instead of a sphere, despite all evidence to the contrary. This joke uses a classic pickup line format where one tries to compliment someone. The humor comes from the double meaning of 'Uranus' which is also a planet, and the juxtaposition between a flat earth, and a round Uranus. It's funny because it's stupid and makes no sense.