There's a really good scifi short story about something called calliagnosia, by Ted Chiang. (Calliagnosia is a condition in which a person can not recognize beauty in a persons face. Not sure whether it was invented for the story or not.)

Here is a crappy PDF of it: http://www.clarku.edu/welcome/placement/pdf/reading.pdf

I'd suggest picking an anthology with the story up if it interests you. I read it in "Best of Scifi 2002" or something like that.