Why do men need to recharge after sex? Scientists make surprising discovery.

Previous research suggesting it's all about prolactin may be missing the mark.

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  • Men and other male creatures need time to recover between ejaculations, and scientists have assumed it has to do with an increase in the hormone prolactin after coitus.
  • A new study finds that manipulating prolactin levels in mice makes no difference in their sexual behavior.
  • The authors suspect more complex interactions may be at the heart of the wait for round two.
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Human sexual desire: Is monogamy natural?

Monogamy is often considered a key component of traditional marriages, but it's only half the story.

  • Depending on who you ask, monogamy is either essential to a successful marriage or it is unrealistic and sets couples up for failure.
  • In this video, biological anthropologist Helen Fisher, psychologist Chris Ryan, former Ashley Madison CEO Noel Biderman, and psychotherapist Esther Perel discuss the science and culture of monogamy, the role it plays in making or breaking relationships, and whether or not humans evolved to have one partner at a time.
  • "The bottom line is, for millions of years, there were some reproductive payoffs not only to forming a pair bond but also to adultery," says Fisher, "leaving each one of us with a tremendous drive to fall in love and pair up, but also some susceptibility to cheating on the side."

Being in a frisky mood may improve your chances in the dating world

Positive, romantic thoughts could produce positive, romantic outcomes while dating.

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  • Fear of rejection, self-doubt, and anxiety are just some of the obstacles humans need to overcome to make a meaningful, romantic connection with another person.
  • According to a 2020 project by a group of psychologists at the University of Rochester (and the Israeli-based Interdisciplinary Center Herzliya), humans see possible romantic partners as a lot more attractive if they go into the interaction with a "sexy mindset."
  • Across three separate studies, this team discovered that this sexual activation helps people initiate relationships by inducing them to project their desires onto prospective partners.
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Sperm don't slither, they swim in a corkscrew motion

New research reveals that because of an optical illusion, we've been viewing sperm incorrectly for nearly 350 years.


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  • Since 1677, thanks to an optical illusion caused by viewing them in 2D, science has assumed that sperm move toward an egg by lashing their tails from side to side like an eel.
  • A new study that used 3D microscopy devices shows that sperm corkscrew forward like an otter.
  • This research could be useful for furthering our understanding about the causes of male infertility by giving us a better idea of the mechanisms that underlie sperms' incredible journey to an egg.
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What really happens in your body and brain when you orgasm?

You may be surprised at how your body and brain react to this type of pleasure.

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  • An orgasm is described as a feeling of intense pleasure that happens during sexual activity.
  • By studying the brain activity of people experiencing orgasms, researchers have been able to pinpoint some of the key changes that occur.
  • These changes include heightened sensitivity to areas of the brain that control how we feel pain, making us less sensitive to it.
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