The consequences of unprotected sex can range from afternoon-ruining to life-ruining to life-ending. This might explain why nature decided to turn the act itself into a powerful antidepressant so we'd have a(nother) reason to keep doing it.
In a study done at State University of New York, it was found that college women who were doing the four-legged polka without benefit of condoms showed fewer signs of depressive behavior than those who used condoms regularly or abstained from sex. Why? Because semen is only about three percent sperm. The rest includes mood-elevating compounds like endorphins, estrone, prolactin, oxytocin, and serotonin. Men walk around with tiny Prozac factories in their pants, it turns out.
"You were terrible."
Since the tissue in lady parts is some of the most absorbent in the body, sex without protection is the most effective way of getting those compounds into the body. This also means that no, the effect won't be as strong if the semen finds its way into the organism through any other ... means. Mother Nature thought of everything, the clever bastard.
But the important thing is that it freaking works. Unprotected sex among college students is considered risky behavior, and thus it would be logical to associate it with all the other things that go with that, like suicidal thoughts. But the opposite happens. Of the women in the study who said they always used condoms, 20 percent said they had suicidal thoughts. When it came to the "sometimes used condoms" group, the number dropped to 7 percent. And the "never used condoms" group? 5 percent. So yeah, either the researchers are onto something or New York condoms are soul-crushingly terrible.
Say It With A Condom
OK, mystery solved.