I read an article that appeared in the HBC Protocols newsletter that claimed that semen is a natural antidepressant. The article referenced a study led by Gordon Gallup, that "showed that the women who were directly exposed to semen were less depressed. The researchers think this is because mood-altering hormones in semen are absorbed through the vagina. They say they have ruled out other explanations."
The other explanations they have ruled out include use of oral contraceptives, personality, strength of relationships, and how often they had sex.
According to the study, which appeared in Archives of Sexual Behavior, women who had sex with condoms scored lower on the Beck Depression Inventory than those who didn't. "The team also found that depressive symptoms and suicide attempts were more common among women who used condoms regularly compared with those who didn't."
The claim is that semen contains mood-altering hormones, including testosterone, estrogen, follicle-stimulating hormone, luteinising hormone, prolactin and several different prostaglandins, which are absorbed through the vagina.
In my humble opinion, those other explanations the team has "ruled out" have a lot more to do with overall happiness than how much semen in being absorbed.
Not to mention the fact that they didn't consider homosexual sex of any kind in the study.
This study sounds like just another attempt to have women believing that they owe everything -- even their happiness -- to men.