About 4 weeks ago was the first time for me. I have been trying to avoid responding here, because.....well, we'll stop that train here. Any way, just thinking about it gets me all tingly. I went to the doctor because of some weirdness afterwards, she said it was normal.
As a man, 5-10 minutes tops, and twitch, bam done sleeping 5 minutes after that.
As a woman, 2+ hours later, still feeling it, full body tingling, increased breathing, heart rate, have to use some meditation techniques to calm down. The slightest touch, and off to the races again.