I happened to me without the penis being touched while anal sex. And i can say that i have never feel an orgasm like that.

I can't explain the pleasure and it was a perfect experience for me.
Normally, i don't like anal sex but if i m horny enough i can do it.

But Orgasm without touching penis feels so different experience and u feel a wonderful pleasure inside of u. You feel the pleasure slowly slowly and when the pleasure is on top you feel like something blow into u and your penis squirt your love juice.

I hope i can live that thing again.