Until recently, morning wood has been a mysterious phenomenon. However, physicians have are few scientific explanations for why you start each day with a salute to the sun.
As you enter the rapid eye movement (REM) phase of sleep, your brain starts to shut off some neurotransmitters. One of these isnorepinephrine, which essentially ensures that you don’t walk around with a boner all day.
In more scientific terms, norepinephrine restricts the blood vessels in your penis. However, when you’re in a deep sleep those blood vessels open up, leading to an erection.
Your body pumps out hormones when you sleep, one of which is testosterone. This is the primary male sex hormone responsible for your body hair, deep voice, and of course, erections.
Your testosterone secretion reaches its peak just after you wake up, which correlates with morning erections. The testosterone theory also explains why morning wood becomes less frequent with age.
Less test, less wood.
A Full Bladder
As your bladder bloats with pee throughout the night, it stimulates a region of your spinal cord that can trigger a “reflex erection.” This is your body’s way to prevent you from wetting the bed. Ironically, trying to pee with a boner is one of the most difficult male maneuvers out there.
A common misconception about morning wood is that it means you’re horny. This might be true in some cases. But most of the time your morning stiffy has nothing to do with sex.
One survey found that most of the men aren’t even aroused when they wake up with an erection. They felt their penis was ‘“in the way’” more than anything else.
How Often Should You Get Morning Wood?