How come sometimes when I just wake up, i get an erection of my penis? -

How come sometimes when I just wake up, i get an erection of my penis? -

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Is this some mechanism of the parasympathetic nervous system?

I love that you can use medical terminology/anatomy, but say -get an erection- like you found it with your car keys or purchased it with some oranges at the grocery store. If you know the proper terms for everything, you should probably know how it all works. Good luck and enjoy your reading!

best time when you-v got lots of energy :)

while your sleepign your body thinks about sex not necessarily in your dreams so you get an erection and if you arent sexually active or er...touching yourself then your body tries to release bodily fluid this way

Morning wood is usually caused by a need to urinate and not cause you were thinking about sex.

Yeah, more or less. Happens to every guy as far as I know. Most guys in good health wake up with an erection nearly every day in their earlier years, not so frequent in the senior years. You also have numerous erections during your sleep, as your body continually preps itself and flushes blood through your organ to keep it in good working order.

Here-s all you should know about erections:

http://en.wikipedia.org/wiki/Erection

That-s why morning sex is the best.

Actually, it-s probably because you need to urinate.

Your question is best answered by Butters from South Park.
Its all answered in this informational video

Click to watch....and learn

http://www.youtube.com/watch?v=V4Jev5AQv��

its called testosterone. its high during the mornings

Sometimes - how about every time? Any man who doesn-t wake up with wood should see a doctor.

I-m sympathetic to your parasympathetic shortcomings.

sellmeth... is right. Morning wood is caused by a full bladder that is pressing on your prostate gland. Any stimulation of the prostate will result in an erection. There is a physical reason -behind- the pleasure of anal sex.(pardon the pun)

Only sometimes? Many guys find they are erect almost every day and some, like my roommate is absolutely every day. It is merely a natural phenomena. Typically a guy gets erect about every 45 minutes while sleeping and the last one of the night is the first one of the morning.

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How come sometimes when I just wake up, i get an erection of my penis? -