From the annuls of lets study something just for the heck of it comes this story about a study involving human volunteers, so scientists could find out which was more enjoyable, intercourse or masturbation.
The study found intercourse to be more "satisfying" than masturbation via a link that appears to connect with their finding, according to a published report.
After an orgasm, a hormone called prolactin is reportedly released in both males and females. This hormone brings on the euphoric feeling of being "satisfied" after sex; in reality, prolactin stimulates dopamine, a hormone that is also released during 'pleasurable' experiences.
Two scientists, one from the University of Paisley in England and the other from the Swiss Federal Institute of Technology in Zurich calculated prolactin levels in both men and women as they watched adult films and masturbated or had intercourse to the point of sexual release.
Prolactin levels in blood were reportedly 400 percent higher in both men and women after orgasm with intercourse as opposed to masturbation alone. The scientists concluded that reaching orgasm with a partner is more fulfilling than without one.
They also touched upon a link between the elevated levels of prolactin to erectile dysfunction; this link could shed light on the reason why men need a recovery time after ejaculation.
Lookin' good for you, Paul. 
