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.