Keeping It Up: The Science of Erections

For many men, getting an erection is as simple as breathing. But it’s an incredibly complex process involving a precise sequence of psychological and physiological events that can easily go wrong.

Erectile dysfunction is defined as the inability to get or keep an erection firm enough to have satisfactory sexual intercourse, however you define that. It can describe a complete or inconsistent inability to achieve an erection, or a tendency to sustain only brief erections.

Here’s how erections work — and how science is helping millions of men keep it up.

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