Sure, I can share.
When I've done this to myself, I'm essentially forcing myself not to tense any muscles. This is extremely difficult for me because I'm really used to tensing up everything just as I'm about to orgasm - stomach, legs, feet, you name it. I get sweaty I tense up so hard when I orgasm. Tensing and orgasm seem to go hand-in-hand for me. Forcing myself to relax seems to stop me from having any orgasm at all! It's like it's impossible for me to orgasm while keeping my muscles relaxed. I just can't do it. It's a wonderful frustration. I really love it. I can basically edge almost indefinitely this way. Eventually I have to either stop or relax the 'twitch rule'. I haver never successfully reached orgasm staying relaxed. It's really pretty amazing experience though.
For subs (males) I have done this with I find it is quite similar except eventually they will orgasm. I'm a little jealous actually. It can take as long as an hour though if I go slow and am methodical. Eventually their cock will contract like crazy. It's really really rock hard and in a continuous contraction. Then they cum and cum and it seems pretty amazing for them. Maximum volume, and of course they are exhausted and are pretty useless to me as a tease toy for many days since their desires are completely sated.
Of course what I really like to do is not quite let them get THAT far, LOL. They ask to cum, I stop and maybe do that a few times and then they have to tuck little Johnny away for bedtime
It disappoints me that I can't seem to ruin orgasms this way, sigh. If I stop just as they start, they cum just as hard anyways. Well nothing's perfect.