] Semen makes you happy. That's the remarkable conclusion
] of a study comparing women whose partners wear condoms
] with those whose partners don't.
]
] The study, which is bound to provoke controversy, 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.
]
] "I want to make it clear that we are not advocating that
] people abstain from using condoms," says Gordon Gallup,
] the psychologist at the State University of New York who
] led the team. "Clearly an unwanted pregnancy or a
] sexually transmitted disease would more than offset any
] advantageous psychological effects of semen."

This could explain a lot.

Semen acts as an anti-depressant