Mistress Tissa, thank you so much for your detailed and thoughtful responses. It made me think, which is truly the key to all of this.

I can't speak about "Dom space" but about "sub space," oh yes, I have gotten drunk on it. That one Domina/athlete I mentioned, in a phone call or two before we had one of our sessions (usually twice a year) I asked for things that were beyond my safe zone. She said, "Oh no, you don't want to do that. You'll just get squirrelly on me just when I'll begin." Oh she knew me... and was absolutely correct. I declined.

As I wrote in another thread, sometimes subs talk with the wrong "head." It takes a responsible and creative Mistress to slap the sub (figuratively and / or literally) to his senses.