Can Exposure To A Novel Partner Affect The Quantity And Quality Of Men's Semen?

In a new study published in Evolutionary Psychological Science, researchers examined whether the timing, quantity, and quality of men's ejaculate changes when they masturbate to images of a familiar woman compared to a woman they have never seen before. The results (and the explanation behind them) are absolutely fascinating. For a look at the details of this study and what they found, check out my latest article over at Playboy. 

While you're there, check out some of my other work, including: 

• The Science Behind The Male Multiple Orgasm
• Will Having More Sex Actually Make You Happier?

Want to learn more about Sex and Psychology ? Click here for previous articles or follow the blog on Facebook (facebook.com/psychologyofsex), Twitter (@JustinLehmiller), or Reddit (reddit.com/r/psychologyofsex) to receive updates.

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