Reddit reviews The Evolutionary Biology of Human Female Sexuality

The theory goes that as humans have hidden ovulation (other mammals go into heat) there is a requirement to advertise fecundity. Other mammals have enlarged breasts only when nursing, as this is the only time there is a requirement for them. Breast development as a secondary sexual characteristic in humans shows the age at which humans can reproduce. In this case humans are unusual as (as another poster said) it is usually the males that develop secondary sexual characteristics (such as peacocks etc). I read about this in this book amongst others.

Yes. that is correct. i have a sneaking suspicion that most psychological processes have been selected for to aid in genetic survival (i.e., passing on your genes). What we consider is attractive is really just healthy (non-symmetry in nature is typically a sign of a mutation or disease). Why men and women find exotic as erotic is probably to maximize genetic diversity. When women deem particular (highly masculinized men) as better short-term sex partners than long-term relationship partners, and other particular (more feminized men), vice versa, what we are seeing is the product of those successful ancestral humans. the second commenter is right - you could talk about this for days, weeks, months, and probably till the end of time - we've only scratched the surface with EP. That said, a good book is Thornhill, R., & Gangestad, S. W (2008). The evolutionary biology of human female sexuality I would recomend a book that explains male human sexuality - but guys are pretty uncomplicated (kidding, but not really). As an aside, it's typically the more investing sex that makes the rules and as such is the crux of the sexual selection process (i.e., men's minds are the way they are as a function of female's demands)