A study has shown that 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.”