About 13%, give or take, danrs,

At least according to cited research (see link.) I wouldn't be too bent out of shape about it. As long as you can enjoy the real thing, the dream might just remain...a dream.

Clearly worse the other way around,
The Love Goddess

Wondering about "wet dreams".  Seems like it would be quite the thing, but I've never had one, even as a teenager.  At 40 plus now, and I've had some damn nice sexual dreams where I seem to get close in the dream, but never finish.  Damn I wish I could, because it seems the dreams are so real, completing the "task" would have to be even better.  A little disturbed or disappointed I'm apparently not capable.  

What percentage of guys never experience this?

And I frequently have dreams in which I ejaculate. No biggie.