No Sperm, No Peace..

There are other studies that have demonstrated the same facts as this and that is, if you are in a stable relationship, you are just about guaranteed to be sane, happy and behave like a female supposed to, physiologically speaking..

Unlike heterosexual females, lesbians haven't got a chance in hell as the comment below really suggests, no sperm, no peace and if you doubt that then have a read of this study on lesbian behaviour and the ongoing abuse they dish out and encounter..

It's part of an older lesbian-feminist paradigm which says most of the problems in the world come from men ...

Butch lesbians may think they are a male but without sperm, they are just sad, pathetic imitators of the real thing without the benefits..

… because lesbians would be expected to be in closer, more intimate contact with one another on a daily basis than other females who live together. What is it about heterosexual females that promotes menstrual synchrony, or conversely what is it about lesbians that prevents menstrual synchrony? It occurred to us that one feature that distinguishes heterosexual women from lesbians is the presence or absence of semen in the female reproductive tract. Lesbians have semen-free sex.

And they wonder why we tire after injecting that magic potion..

An ode to the many evolved virtues of human semen

Link..
Now, medical professionals have known for a very long time that the vagina is an ideal route for drug delivery. The reason for this is that the vagina is surrounded by an impressive vascular network. Arteries, blood vessels, and lymphatic vessels abound, and—unlike some other routes of drug administration—chemicals that are absorbed through the vaginal walls have an almost direct line to the body’s peripheral circulation system. So it makes infinite sense, argue Gallup and Burch, that like any artificially-derived chemical substance inserted into the vagina via medical pessary, semen might also have certain chemical properties that tweak female biology.

It turns out that this insight, so obvious as to be all but invisible, has been a theoretical gold mine for this hawkeyed pair of adaptation-minded thinkers. But before we jump into their rich vat of seminal theory, let’s have a quick look at some of the key ingredients of human semen. In fact, semen has a very complicated chemical profile, containing over 50 different compounds (including hormones, neurotransmitters, endorphins and immunosupressants) each with a special function and occurring in different concentrations within the seminal plasma. Perhaps the most striking of these compounds is the bundle of mood-enhancing chemicals in semen. There is good in this goo. Such anxiolytic chemicals include, but are by no means limited to, cortisol (known to increase affection), estrone (which elevates mood), prolactin (a natural antidepressant), oxytocin (also elevates mood), thyrotropin-releasing hormone (another antidepressant), melatonin (a sleep-inducing agent) and even serotonin (perhaps the most well-known antidepressant neurotransmitter).

Given these ingredients—and this is just a small sample of the mind-altering “drugs” found in human semen—Gallup and Burch, along with psychologist Steven Platek, now at the University of Liverpool, hypothesized that women having unprotected sex should be less depressed than suitable control participants. To investigate whether semen has antidepressant effects, the authors rounded up 293 college females from the SUNY-Albany campus, who agreed to fill out an anonymous, written questionnaire about various aspects of their sexual behavior. Recent sexual activity without condoms was used as an indirect measure of seminal plasma circulating in the woman’s body. Each participant also completed the Beck Depression Inventory, a commonly used clinical measure of depressive symptoms.

The most significant findings from this 2002 study, published with criminally modest fanfare in the Archives of Sexual Behavior , were these: even after adjusting for frequency of sexual intercourse, women who engaged in sex and “never” used condoms showed significantly fewer depressive symptoms than did those who “usually” or “always” used condoms. Importantly, these chronically condomless, sexually active women also evidenced fewer depressive symptoms than did those who abstained from sex altogether. By contrast, sexually active women, even really promiscuous ones, who used condoms were just as depressed as those practicing total abstinence. In other words, it’s not just that women who are having sex are simply happier, but instead happiness appears to be a function of the ambient seminal fluid pulsing through one’s veins.

And it gets better. A smaller percentage (4.5 percent) of the sexually active women who “never” used condoms were less likely to have attempted suicide than were those who “sometimes” (7.4 percent) and “usually” (28.9 percent) and “always” (13.2 percent) used condoms...

In addition to their semen-as-antidepressant model, Gallup and Burch have worked out many other intricate, persuasive arguments about how the various chemicals in human semen served—and continue to serve—biologically adaptive functions for both sexes. For example, among the more curious ingredients in human semen are follicle-stimulating-hormone (FSH) and luteinizing hormone (LH). The reason this is curious, point out Gallup and Burch, is because these are distinctively female hormones. “What are female hormones doing in human semen?” The authors speculate, and convincingly so, that the presence of FSH and LH in human semen is related to concealed ovulation in human females.

Unlike females of other primate species, women do not have breeding patterns governed by season or standardized cycles, and there are no obvious signals—such as a fire-engine red, swollen rear end—giving away their time of the month. So for a naïve human male, impregnating a woman as a consequence of sexual intercourse is much more a roll of the dice than it is for males of other species in their mating behaviors. Just as with any other species, though, getting the timing right so that release of semen coincides with the release of eggs is key. As a counterdefense against women’s concealed ovulation, male evolution had a trick up its sleeve, which was the ability to manipulate the timing of a woman’s ovulation to suit his own insemination schedule—that is to say, semen chemistry seems to give premature eggs a nice little nudging. Hence the conspicuous presence of FSH (which causes an egg in the ovary to ripen and mature) and LH (which triggers ovulation and release of that egg).