I did that once...kept "edging" and "edging" my body to the brink of climax without going over the edge. I did it over a period of several hours. When I finally did have an "O", it was awesome. The only problem is that when I thought about it in retrospect, I could have had 10 "O's". Now that pi$$ed me off!!!!!!!!!!!
I've not done it again since then. I do agree that there is something to the build-up, but daggone girl, why not just let it happen and get continuous pleasure?!?!?!