Sex toys are displayed during the opening day of the 'Erotica Dream 2010' erotic fair in Nice, France in September 2010. Oxytocin, a feel-good hormone that reduces fear and lowers your cortisol (a stress hormone) and blood-pressure levels, peaks in your body 1 to 2 minutes after climax. But whether you've had sex with a partner or simply flown solo, your body chemistry won't stay in the stratosphere for long. "Levels return to normal within 10 minutes of orgasm," says Debby Herbenick, Ph.D., a sex researcher and educator at Indiana University. "Oxytocin can be released during close touching," says Herbenick. The longer she keeps her arms wrapped around you, the more oxytocin is released and the better you'll feel.