oxytocin
"Several researchers are testing inhaled oxytocin in combination with psychotherapy. In this case, oxytocin is like training wheels on a two-wheel bike. It can help you experience some intimacy and trust, so it's easier next time."
Oxytocin binds mothers to infants, and it seems to have similar affects on sexual partners. You don't necessarily need to go all the way to get some of the benefits. "Oxytocin is like a hormone of attachment," said Carol Rinkleib Ellison, former assistant clinical psychiatry professor at the University of California, San Francisco. "It creates feelings of calm and closeness."
"Oxytocin is like a social peptide in the brain; it mediates bonding between humans, including mother to child. As a therapeutic agent it may provide benefits in people with mental illness, for example, to stimulate social interaction in people who are depressed. The potential benefits of oxytocin are very exciting,"
"To put it plainly, oxytocin is like emotional glue. When released in our bodies it binds us to the individuals responsible for that release. The times where scientists see the greatest amounts of Oxytocin released in humans: you guessed it ... during child birth and during an orgasm."
"Furthermore it isn't the cause if it exists, but a result.
Oxytocin is like using a sledgehammer to drive a nail in. It's seriously overhyped as of late as a cureall for anything from autism to psychosis."

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