Why do you get a ***** or a stiffy in the morning (also known as morning glory)?

anyone know any clever scientific answer?

Why do you get a ***** or a stiffy in the morning (also known as morning glory)?
Most healthy men wake up in the morning with an erection. The slang term for this is "morning wood." This is normal and it's fairly common. Men have several erections a night as part of their sleep cycle. Many times they wake up and find they are still erect.



A man's penis becomes erect ("hard") in response to sexual arousal, excitement, and deep relaxation, such as what's experienced in deep dreaming sleep. An erection is caused by a rush of blood to the penis. A man's penis, especially a young man's penis, can also become erect without any kind of arousing stimulation — this is called a "spontaneous erection."
Reply:Answer: Evolution.



Cave men (or insert more scientific-sounding term for early man) would go hunting in the morning. Back then, hunting was much more dangerous than today. Odds of not coming back were significantly higher.

So, cave man would instinctually have sex before leaving for the hunt. This helped to ensure that, if he did not come back, the species would continue.
Reply:In the REM stage of sleep your body becomes paralyzed. This is so you dont go sleepwalking. A side effect of this is is a "*****" as you so nicely put it.
Reply:that is when guys dream about sex all night and then they want it in the morning time