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What science knows — and doesn’t — about orgasm.

Orgasms are an autonomic reflex — part of the nervous system responsible for behaviors we don’t consciously control, explains science writer Mary Roach (TED Talk: 10 things you didn’t know about orgasm). Yet unlike other reflexes, the anatomy of orgasm is still controversial terrain. To learn about more coital curiosities, read the list below and watch this TED Talks playlist about sex.

G marks the spot

Named after gynecologist Ernst Gräfenberg, the G-spot remains surprisingly elusive in scientific research, although many women can verify its existence. Some researchers argue that this erogenous zone is linked to the urethral sponge and the female prostate, while others uphold that the G-spot is a female human anatomy myth. Read more about the debate.

What science didn’t know about male anatomy

There are some basic facts about the human body that science is still figuring out. For example, how does the male erection work?…

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