When I edge, I go for about one to two hours on average. My longest was 5 to 6 hours. I found that after five hours my balls would sometimes hurt. I suppose that comes from getting too close to ejaculating, then holding back. Over the years I've learned not to get too close to the edge.
When I have the time and my body cooperates, edging is so great. Amazing where you can go with sensation when you have the time to relax and focus. The other night I was feeling so good I stayed up all night edging til the next morning. I really felt awful having to wake up the next day. I guess I had an edging hangover! No, as most of you know it usually feels awful to go through your day having hardly any sleep. It's just that when you are feeling that level of ecstasy it's hard to stop. I'd love to hear more of all your experiences with edging and what you experience.