To be taken with a grain of salt. Sexuality is complicated
Studies in anthropologie: The world has more men than women. So that must be why women seem more valuable in society. Which might explain why women seem to have their pick of the litter in relationships and why men have such a hard time getting the right one, often settling for: A- just plain settling or B- another guy.(bisexuality)
Note: further study on how the ratio might effect sexuality in BOTH genders remains to be done.