# what's the deal with morning wood?

**URL:** https://boards.straightdope.com/t/whats-the-deal-with-morning-wood/183017
**Category:** Factual Questions
**Created:** [June 19, 2003, 10:18pm UTC](https://boards.straightdope.com/t/whats-the-deal-with-morning-wood/183017 "2003-06-19T22:18:45Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![gutterhippo](https://avatars.discourse-cdn.com/v4/letter/g/6bbea6/32.png) [@gutterhippo](https://boards.straightdope.com/u/gutterhippo)
#### Post date: [June 19, 2003, 10:18pm UTC](https://boards.straightdope.com/t/whats-the-deal-with-morning-wood/183017/1 "2003-06-19T22:18:45Z")

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What’s the deal with “morning wood”? My psychology of human sexuality teacher said that erections are not uncommon in males during REM sleep and so if a male is woken up during REM sleep, he may still have an erection. I disagree with this explanation. I think that it has something to do with the blood flow in your body when you come out of sleep. I also think it might have to do with the position of your body in relation to your blood flow. I might be going into too much detail here, but speaking from personal experience, if I have an erection when I wake up and I sit up, it goes away. Then if I lie down again, it comes back. Okay, sorry you had to read that, but anyways, can anyone explain morning wood?