One interesting result she mentioned was that one thing that correlated with how concerned people were with physical beauty was how common parasites are among the population. If a person is infected with a parasite it's harder for them to produce thick hair and clear skin, so those things become better indicators of the health of a person.
The reason reading this might be bad for me, is that it reinforces my tendency to believe that people do evaluate each other on the basis of appearance. I tend to take that information and think of myself as being undatable because I'm not sufficiently attractive. (Though if health is one of the important factors in evaluating attractiveness, I wonder why I don't fare better)