Is Prozac just not doing it for you?

Semen: Nature's Anti-Depressant

According to one researcher, semen has anti-depressant properties. "Semen appears to act as an antidepressant in women," said psychologist Gordon Gallup, PhD. "In our studies, women who have unprotected sex have lower levels of depression."
The doctor added that there was no difference in depression scores between women having heterosexual sex with condoms, lesbian sex, or not having sex at all.
"Women [who have sex] without condoms are also more likely to fall victim to the rebound effect following the breakup of their relationship," said Gallup, suggesting that there is a withdrawal effect when semen exposure stops.