I have never cum asleep but have woke up just about to cum and finished off very fast
I think I've had a couple over the years but they are very rare (I'm a girl, though). I just remember waking up being soaking wet and I just have to finish myself off because I'm madly aroused. haha
I have never had one sadly. I tend to always wake up when I'm having an erotic dream :(.
I’ve woken myself up during an orgasm many times, once however (at about 19/20 years old) I woke up with a stranger in bed watching me too. He was pretending to be asleep but I could see him staring at me open mouthed as I rubbed myself while sleepy. It resulted in some pretty hot morning sex!