I feel you're thinking of it in a very bureucratic way. Or maybe you've only been with people that think of it that way.

I think that if there's trust in the relationship, you are not needed to base your actions off what The Law says. Really, when a girl says "you can do anything you want to me", it's because she trusts you that you'll never want to do anything bad to her, or anything that she wouldn't like.

In this particular case, if she has already told you something like "you can do it whenever you want", it's OK. And only if you have the goal to wake her up in a surprising and pleasant way (for her).

If you use her body for your own physical pleasure only, on her sleep, and she never notices, then it's not OK at all (and it's kinda embarassing for you that she doesn't wake up from it). Also, I remember this case where the guy got his wife pregnant on her sleep. The thing is that, they were at odds at the time, but they were still sleeping together despite not having intercourse. Then she later found out she was pregnant, and couldn't figure out how it happened...

It's kinda hard to do it while sleeping, but it it's a great thing to wake up to.

I think that sleepsex is one of those nice untruths that couples pretend toI act on...... How could she not wake up while you're boning her?

ha ha, I'm not sure how this is possible. Did she have that drop-sleep disorder I forget the correct term).

- He has a micropenis

- He has a penis as hard as this: http://victoriabelanger.files.wordpress.com/2010/06/rainbow-jello.jpg

- Her lady parts are as loose as an old sock

I couldn't do this even if she gave me permission to.

LOL. Actually, she intentionally took xanax before she started drinking, and  promised me a wild night. We had been dating for about 4 years. We met in middle school and attended the same high school. We had sex for our first times about 6 months earlier, and she wanted to try different stuff and didn't want to feel too much pain. So, her friend recommended she take xanax. I thought it was a bad idea, I was pretty pissed she fell asleep on my d**k. Her jaw kind of locked up and scraped the fuck out of my shit. Needless to say, it was not a very fun night at all. She was inanimate and useless, and i ended up sore and unpleasured. 

There is this one girl, friend of mine, she is 23, so, an adult. She told me that she had this fantasy of being taken while sleeping, trying to resist still yet asleep and than giving it up and doing it.
She said that in the very night we were sleeping together at a hotel, we were kinda dating-friends.
So, I did the deed. And SHE LOVED. But I only did it because the girl was into it.
So, yes.

But, she did woke up after a little while, then she pretended to fight the whole thing for some minutes and, then, it turned into normal sex.

It's just very scary because you can think you have that trust, and that you can take some of her words to imply consent, and then next thing BAM jail time.

BOTTOM LINE.  If you are trying to have sex with a woman and she doesn't notice/wake up, you have smaller problems than you know.