Evolutionary psychology and dating
Or, rather, researchers are always telling us that we do.
Attitudes about sexuality have generally been governed by evolutionary psychology.
This explains why men, for whom it would normally make the most sense to simply impregnate as many women as possible, began to invest more heavily in the success of one pregnancy.
This means that for most species we can equate intrasexual selection with male/male competition and intersexual selection with female choice." "In 1972 Robert Trivers suggested that sexual selection is directly related to asymmetries between the sexes in the amount of effort that each parent puts into raising the offspring.