A researcher at the increasingly entertaining University of Paisley has conducted a study comparing the relative merits of masturbation and sex with another person or people. Stuart Brody, who earlier demonstrated that having sex before exercise actually improved athletic performance, studied blood levels of the pleasurable hormone prolactin in the blood of no-doubt-enthusiastic volunteers after they either masturbated or had sex with another person.
Surprisingly, after orgasm from sexual intercourse, the increase in blood prolactin levels is 400 per cent higher in both sexes compared with after orgasm from masturbation.
Which may explain why people masturbate four times as often as they have actual sex: They're just catching up.
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