The quest to solve the riddle behind a woman's orgasm has evaded mankind for years on end. Even women are not quite sure what stipulates as "achieving orgasm," with some claiming to have never experienced it at all!

That being said, evolutionary psychologists, biologists and anthropologists have come up with the possible answers which give us some interesting clues to why we have sex the way we do today.

Think about it: Achieving orgasm is not necessary for conception, so why should it even exist at all?

Based on the standard narrative of human sexual evolution, some speculate that orgasms evolved in the human female to help ease them into monogamy and their role as the heart of the nuclear family. This "theory", however, becomes problematic as most orgasmic species happen to be among the most promiscuous as well:

As primate sexuality expert Alan Dixson writes, this monogamy-maintenance explanation for female orgasm "seems far-fetched." "After all," he writes, "females of other primate species, and particularly those with multimale- multifemale [promiscuous] mating systems such as macaques and chimpanzees, exhibit orgasmic responses in the absence of such bonding or the formation of stable family units." On the other hand, Dixson goes on to note, "Gibbons, which are primarily monogamous, do not exhibit obvious signs of female orgasm." Although Dixson classifies humans as mildly polygynous in his survey of primate sexuality, he seems to have doubts, as when he writes, "One might argue that . . . the female's orgasm is rewarding, increases her willingness to copulate with a variety of males rather than one partner, and thus promotes sperm competition."

More bizarre theories include the one which states that women have more orgasms when compared with other species simply because men are better lovers.

Some studies have also theorised that perhaps it may be due to one's location. Half of women questioned (Americans in the 1950s) experienced orgasm at least nine out of ten times they had intercourse, whereas in other societies (he refers to Mangaia, in the South Pacific), elaborate and extended sexual play result in nearly universal orgasm for women.

This led to the conclusion that an orgasm should never be considered to be a spontaneous and inevitable occurrence for females as it always is for males," which in laymen terms means that some women have orgasms sometimes because all men do every time.

To explore more in-depth research on the female orgasm, visit Sex at Dawn.com