Allan wrote wanting the lowdown on morning erections. Why do guys get them? he asked. They definitely makes the first pee of the day a challenge. 

The cause of Nocturnal Penile Tumescence or “morning wood” as it’s often called, is not known. There several popular theories. Some believe that the a full bladder places pressure on the nerves that cause reflex erections. Other suspect the erections are the bodies way of preventing urination overnight. And some think it’s the body’s way of increasing blood flow to keep the penis healthy.

Penises are restless sleepers. Barring physiological issues, the average cock gets hard between 3 and 5 times per night. These erections tend to coincide with REM sleep, a phased which becomes prolonged a morning approaches. We often wake up out of REM sleep, so if you have a penis there’s a good chance it’s going to be alert and ready to start the day…even if you aren’t.

p.s. Many thanks to Martin for tweeting me about the urination theory!


  1. garnerhaines says:

    Did you mean “theories”? Because if there are popular series about morning wood, my PVR missed them.

  2. And now I have “Nth Degree” running through my head. 😉