Due to the inherent differences in orgasm between women and men, females were asked to report how often they had orgasms during sex and how difficult they were to achieve, while males were asked how long it took them to reach orgasm during the act and how often they felt they ejaculated too quickly or too slowly.
Lades speram out sex
There may be few questions of human sexuality more rancorous than those about the female orgasm.
Scientists agree that women probably started having orgasms as a by-product of men having them, similar to how men have nipples because women have them.
As Elisabeth Lloyd, a philosopher of science and theoretical biologist at Indiana University put it in her 2005 book "Females get the erectile and nervous tissue necessary for orgasm in virtue of the strong, ongoing selective pressure on males for the sperm delivery system of male orgasm and ejaculation." But why we ladies still have orgasms is hotly debated.
Male orgasms exist, it's widely believed, to encourage men to spread their seed.
On face value, it would be easy to say that women orgasm for the same reason: to encourage them to have sex and make babies.
But in practice, compared to male orgasm, female orgasm is very difficult to achieve.
There's a lot of variation even within individual women, and 10 percent of women never have them at all.
And, unlike male orgasm, female orgasm isn't a prerequisite for pregnancy. There are two firmly opposed camps on this question.
The first group proposes that it has an adaptive function in one of three categories: pair bonding, mate selection and enhanced fertility. The pair-bonding theory suggests that female orgasm bonds partners, ensuring two parents for the offspring, while mate selection offers that women use orgasm as a sort of litmus test for "quality" partners.
The enhanced fertility theory, meanwhile, proposes that uterine contractions during female orgasm help to "suck up" sperm into the uterus.
The by-product camp, on the other hand, claims that female orgasms are to this day an incidental by-product of male orgasm, not an evolutionary adaption.