Fisher suggests that female preference began because the trait indicated the male's quality.

Dr. Moller next investigated possible reasons for the female preference.

A barrier to gene flow exists from South to North as a result of the female preference.

Due to the female preference, males have evolved to compete with each other for mating rights.

If male traits that decrease female fitness spread, then female preference will change.

One important female preference will be for males who control more resources which can help her and her children.

One view maintains that male ornaments co-evolve with female preferences.

With female preferences in play, the coloration of males would change more rapidly.

This differential in parental investment indicates that there will be a strong female preference.

A number of studies have been conducted specifically analyzing the differences between male and female preference in video game styles.