More than a reflex: How the spine shapes sex

For decades, it was thought that while the brain orchestrated male sexual behavior—arousal, courtship, and copulation—the spinal cord merely executed the final act: ejaculation. But a study from the Champalimaud Foundation (CF) challenges that tidy division. It reveals that a key spinal circuit is not only involved in ejaculation but also in arousal and shaping the choreography of sex, adding a surprising new dimension to our understanding of sexual behavior in mammals.

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