Editing Orgasm (section)

=== Selective pressure and mating ===

Wallen K and Lloyd EA state, "In men, orgasms are under strong selective pressure as orgasms are coupled with ejaculation and thus contribute to male reproductive success. By contrast, women's orgasms in intercourse are highly variable and are under little selective pressure as they are not a reproductive necessity."<ref name="Wallen K, Lloyd EA" />

[[Desmond Morris]] suggests in his 1967 popular science book ''[[The Naked Ape]]'' that the female orgasm evolved to encourage physical intimacy with a male partner and help reinforce the [[pair bond]]. Morris suggested that the relative difficulty in achieving female orgasm, in comparison to the male's, might be favorable in [[Darwinism|Darwinian]] evolution by leading the female to select [[Mating|mates]] who bear qualities like patience, care, imagination, and intelligence, as opposed to qualities like size and aggression, which pertain to mate selection in other primates. Such advantageous qualities thereby become accentuated within the species, driven by the differences between male and female orgasms. If males were motivated by and taken to the point of, orgasm in the same way as females, those advantageous qualities would not be needed, since self-interest would be enough.