I'm afraid that regarding the handling of clits and vulva with fingers and tongue, men and women are on an equal footing. It all depends on skill. Men may even have an advantage because their fingers may be thicker, but that's all.
First off, you're comparing something who spent her whole life studying her own gender. This is not including the certain chemicals and psychological traits that one exposes during intercourse. It is not equal. I will explain this in further later.
Second, you are half correct.
Refractory period happens only on males as it has something to do with the release of tension within the walls of seminal vesicles and relaxing the other physiologic systems, such as breathing, blood pressure, and gut motility. Such a thing happens in order to keep the body from damaging itself
All women are capable of multiple orgasms but some experiences clitoral hypersensitivity which, while not exactly prevents orgasms, makes it further sessions painful and undesirable, making you half-correct
Third, female sex has little to do with endorphin at all actually, but more about oxytocin and estrogen.
Endorphin is the chemical that turns pain into pleasure and fills the brain with the essence of euphoria. While it does exists in sex, its effects only lasts as far as the orgasms go. Once the aftersex comes, the oxytocin takes major role
Oxytocin is the major chemical that allows humans to form a bond with their partner. Unfortunately, its effects differ with gender.
In males, the effects of oxytocin is generally muted because of presence of testosterone. The higher the testosterone level of a man is, the more likely it is that he will leave the woman behind. Such is the reason why women are scared of men with extremely deep voices - deep voices showcases a high level of testosterone and are very unlikely to be good fathers
On the otherhand, if oxytocin was combined with estrogen, the affectionate effect multiplies-allowing them to form an even deeper and closer relationship. This is the reason why almost all pornographic materials that features lesbians are heavily inclined to be soft and gentle, plotbased even.
such is also the reason why of all the genders, lesbians have the lowest chance of infidelity
http://www.dailymail.co.uk/news/article-1363577/Women-fear-men-deep-voices-likely-cheat-them.html
http://justinattraction.com/2013/06/why-women-get-more-attached-after-sex/
Now, don't get me wrong, I am not really arguing with you or anything bad. I just wanted to share what I know.