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Then, McCartney explained, the friends and collaborators shouted out names of hot babes to increase blood flow to the penis. The revelation that McCartney did more than just get by with a little help from his friends swept the internet. But of course, Paul and John are surely not the only straight-identifying male friends to simultaneously play with their yellow submarines. The group aspect was purely practical.

And it has many health benefits. Here are 11 things you probably never knew about your favorite hobby. If you thought the first time you touched yourself and realized it felt really, really good was when you hit puberty, you might be wrong. In a recent study from Harvard, men who ejaculated 21 or more times per month had a 19 to 22 percent lower risk of prostate cancer than men who did so only four to seven times per month. A study discovered a fairly groundbreaking statistic about masturbation: Only 57 percent of straight men masturbate on a regular basis. According to study author Debby Herbenick, Ph. Some men could just be having lots of sex with their partners.

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This post is part of Mashable's Masturbation Week. May is National Masturbation Month, so we're celebrating by exploring the many facets of self-love. Look, we've all been there.