So, now you have a rough idea of what the discipline is all about.
There are too many theories and hypotheses to list all of them here; however, I’ll briefly mention a few of my favourite.
It has been cross culturally demonstrated that human males prefer females with a low waist to hip ratio of 0.7.
Even among communities in which larger sized females are culturally preferred the ratio of 0.7 holds true.
Females with such a waist ratio have also been shown to have higher than average fertility, as measured by number of offspring and successful carriages to birth; these women also experience fewer pregnancy complications.
What a wonderfully tidy little theory that is.
Another example would be that of female short term mating strategy.
Females are more likely to engage in extramarital sex and have thoughts of infidelity around ovulation; females are also more likely to engage in extramarital sex with males who appear to be of high genetic quality.
That is to say: symmetrical, masculine, tall, muscular, etc.
This is covered by the Sexy Son Hypothesis and the experiments designed to test it are just brilliant.
I won’t go into them here; however, I shall recommend a book to you:
Evolutionary Psychology: The New Science of The Mind – David M Buss.
It’s a great introduction to the field and very interesting.
Evolutionary is the science of 20/20 hindsight in many ways, as some aspects of it seem obvious in retrospect; however, it is a truly fascinating area of study.