The health benefits of orgasms aren't all that well known, in large part because big, controlled studies haven't been done (researchers aren't usually willing to ask subjects to masturbate while being monitored). For most of the existing studies, scientists either ask participants to report their orgasmic history – not always the most dependable data – or find subjects willing to orgasm in a controlled lab environment. Because of this, much of the information that's out there about what happens to our bodies during and after sex is still fairly preliminary.
But what data we do have strongly suggests that orgasm are very good for us. "The bottom line is that orgasms are probably better for your health than they are worse for your health," says Barry R. Komisaruk, a professor of psychology at Rutgers University who specializes in behavioral neuroscience and sexual health. Here's a close look at the orgasm – and how it impacts our health.
In 2004, a study from the National Cancer Institute compared 50,000 men and found that those who had more than 21 orgasms each month were 30 percent less likely to develop prostate cancer than those who had fewer than seven. Another study in 2003 had 2,000 men report their ejaculation history from when they were younger. They found that men who reported more than five orgasms a week in their twenties had a one-third lower incidence of aggressive prostate cancer later in life. Researchers aren't positive about why this happens but there one theory is that ejaculating often clears the prostate of old semen that would otherwise turn carcinogenic.
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