I do this and enjoy it. I edge for up to two hours every morning. I like tasting the beads of precum which forms on my cock. In the last few years, I "discovered" external prostate stimulation. When I edge, I only play with my cock which is rather strange since I LOVE when my wife plays with or sucks me and adds ball play to the event. At any rate, with hours of edging, I get pretty ramped up. Sometimes, the tension is to the point where I need to feel that release. So, I've developed a habit of wanking or shaking my cock with one hand while rubbing and pressing on my taint and trying to massage my prostate.
I get to a PONR and can feel an orgasm near. I stop wanking/shaking my penis, place that hand under the tip of my cock, and continue rubbing and pressing my taint. Cum-like substance will dribble out of my cock but I believe that it is prostate fluid and not really cum. The taste is not bitter as a real ejaculation and the fluid is more transparent and "slipperier". I lick this off my palm and can sometimes repeat the process within minutes, getting more of what I assume is prostate fluid.
If I'm still not fully satisfied, I can jack off to an orgasm with "real"cum. And, that the taste of that is definitely different from precum and prostate fluid.