It’s 4 a.m. and you’ve just been woken up by a rock-hard boner poking you in the back. Seriously, dude? This phenomenon, also known as morning wood, is so common that doctors actually have a medical name for it: nocturnal penile tumescence (NPT).
While you might notice this medical miracle more frequently in the wee hours, these boners can occur anywhere from three to five times throughout the night. “It’s typical of adolescents and young men, due to their peak levels of hormones, which correlate to the frequency of their erections and their need for release,” says Gloria Brame, Ph.D., sexologist and author of Sex for Grown-Ups. “Naturally, as men age, this occurrence wanes as their testosterone levels and sexual function decline.”
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