well, i think people can't help not liking eachother for looks... it's nature's way of weeding out the ugly people... LMAO!!! J/k... but really, it's in our genes to find someone attractive to us. Like butterflies, they chose their mate based on it's beautiful wings...
you know, this is kind of off topic, but my cousin has this theory about "natural selection" in humanity... Ok, so here it is. In high school (last year for her), she noticed that all of the stupid people in school were the ones always getting pregnant. Then it dawned on her that if the stupid ones keep getting pregnant so young, and the smart ones wait until they graduate college to get married and pregnant, then it's doomed that the stupid ones are going to pass on their genes at a much quicker rate than the smart ones, and in a few hundred years, the whole planet is going to be run by a bunch of bimbo blondes getting pregnant at the age of 10... i'm so sad for this planet...