The Theory of Relative Hottness

The theory that states that one judges a guy/girl's hottness by comparing him/her to those around them. This explains why one would think someone is hotter when seen at, say a movie theater, than at school. There are fewer to compare them to.

Guy 1: Dude, that girl that goes to your school is really hot.
Guy 2: Naw, that's the theory of relative hottness. At school she's not that hot.