We select mates based on perceived evolutionary fitness. However, appealing traits (such as large breasts or muscles) may not truly correlate with evolutionary fitness. Although large breasts certainly imply a superior child-rearing ability, physical traits rarely convey other flaws such as stupidity, infertility, or the presence of genetic diseases.
On the other hand, as humanity approaches an era of unprecedented biological manipulation capability, it could be argued that since it is now possible to sequence and analyze another individual’s genome before mating with him, we have improved upon evolution and natural selection.
This raises the recursive question: is our knowledge, the result of several thousand years’ exploration and research, which allows for innovation and raised awareness and in turn genetic analysis, also a product of natural selection? Have we evolved to improve upon evolution?