I notice when I am doing prolonged teasing sessions, the sub gets to a point where he is just exhausted from all the sexual tension (especially if he knows he will not get release). I am considering working on keepinbg the subs emotion/passion levels somewhat more restrained. I mean, I want them to feel lust and love and passion very intensely, but it's just a bummer if it leads to exhausion, imo. Perhaps just suggesting that a sub remain in a certain mode will help. Have any Dommes or subs come across this issue? 

I had an ex who was young and very beautifull and this girl loved to dance for me alot, taking her clothes off and teasing me for the longest time. Its very erotic and I noticed this was in this girls and she actually got off on it also. I think it was the attention she got and also the power of making guys want her, lol.

I know this by the time we did end up doing things after her hour or two hour dancing around in sexy outfits and torturing me with her body, I was ready to go nuts, lol. Its an awesome thing in any situation even if its not D/s. Smart women can use it to their advantage....

There is an explanation around energy transfer which some folk see as being part of the explanation - the dominant tease feeds off the sub producing the feelings of exhaustion.

The more prosaic response is that the body's endogenous systems of arousal and excitement eventually exhaust the subject in terms of their physical, mental and sexual responsiveness.

Constant levels of even distance arousal are wearing and eventually lead to normalisation after a few days in most males.