a theory that a man, no matter how unattractive he may seem at first, he will eventually look beautiful to you if you see him every day all day.

Based on the theory that sailors used to spend months at sea and started to slowly see manatees turn into mermen.
Alexa: omg Cody is kind of a badass.

Anya: Are you nuts?! He's no Khal Drogo or Jason Mamoa. It's probably just Merman Theory. You guys work every shift together at the hospital.
by Childish Bambino October 20, 2018
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