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This Is Why Guys Wake Up With A Boner In The Morning

It doesn't really have to do with you.

On most mornings guys wake up and face a joyful few minutes of either trying to pee with a boner/deciding if they should jack off/see if the person next to him is up for sex.

It's actually called nocturnal penile tumescence (NPT)​ and it's really common.

There are actually two types of boners: The Psychogenic Boner and The Reflex Boner. The first is when he's triggered by sexy things, and the second is thought to be more of an internal trigger, like when he's bored and OH, THERE'S A SURPRISE BONER, or when he's taking an exam at school and then right before he needs to leave OH, THERE'S A SURPRISE BONER.

This is thought to be the link to his morning glory. A popular theory is that getting an erection will prevent him from wetting the bed, and is his body's response to a really full bladder.

IFL science report another theory: "​One idea is that these sleep exercises actually contribute to the health of his junk. Erections cause the erectile tissue (corpora cavernosa) to swell, which in turn oxygenates the tissue. This oxygenation maintains its viability and helps to prevent cavernous fibrosis, a condition that can ultimately lead to erectile dysfunction.​"

So there you go.

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This article originally appeared on Cosmopolitan.co.uk. Minor edits have been made by the Cosmo.ph editors.