The Igloo theory, also known as the snowtrapped theory, is the theory that if two people that hate eachother get stuck in a cold place (ex.: an igloo) together, due to being cold, either one is going to murder the other or they will have sexual intercourse
Dude 1: Yo we should totally trap those two ennemies in an igloo.
Dude 2: Why is that so?
Dude 1: Because they will either kill eachother or have sex, it's the igloo theory
Dude 2: That sound unrealistic, but yeah, we should try that on some people. How about world leaders?
Dude 1: Sure!