but that does not compute: we know sexual selection is largely determined by competition which implies choice propelled by desire to pass along their own genes. this is brought abt by passing along the fittest (expression) genes in the next generation and its all instintctual; so in that way they do actually recognize sucesssful genes when they see them expressed.
Sexual selection would be searching for healthier genes if and only if genes mutated at a phenomenal rate ~ which they don’t. I think sexual selection has been pretty well debunked with the discovery that breast size, hair thickness and number of sweat glands and shape of teeth are under the control of a single gene ~ (http://www.nytimes.com/2013/02/15/science/studying-recent-human-evolution-at-the-genetic-level.html?_r=1&; ) ~ you’ll want to read that piece ~ same gene in mice as in men! The thing has GEOLOGICAL AGE STABILITY