is it possible for me to orgasm by tensing my pc muscle only?

Yeah, some really gifted guys can do that. Congratulations!

Look up "hands free orgasm" on line,...there's videos of many guys doing it.

I've been trying to do it off and on for about a year. No luck so far,but I have come close. I think I might have had a better chance when I was younger. I won't rest till I have one.

I had one by accident recently...

My missus was giving me one of those slow saturday morning blowjobs.... taking me to the edge, then stopping, back to the edge, then stopping.

She'd done it a handful of times and the last time she stopped I involuntarily tensed my whole body and then just streamed cum, it didnt spurt, just pout like a river.

I nearly passed out it was that good!

I can only do that after edging a lot and then when I am very hard and close, release my cock and just stand there tensing and releasing that muscle until I cum. easy when I was young now I almost break into a sweat trying to get it to pump out.

I have had hands free orgasm when taking self picks of my cock.

I can make myself shoot my load with no stimulation in about 3 minutes.I find that I still feel horny afterwards and can do it multiple times.I like doing it in my briefs (swap anyone) or naked.

I have done it after years of trying. You have to edge over a day or two. Wake up with a nice erection (the kind that is hard to get rid of when you need to take a piss helps a bit) and just think of everything that can make you cum. Tensing the PC helps later on, but if you keep a constant tense on it you may lose your erection. It is very much a psychological thing because when I would get close, I would get nervous about losing my erection and lose it at the last minute. Just keep powering through. It is pretty awesome. You will feel a great sense of accomplishment if you have been trying to do this for years.

I've done it, but not since I was a kid. I was around 7 when figured out that if I rhythmically squeezed 'that muscle down there' just right, I could have a super-intense dry orgasm without touching my penis. That trick allowed me to enjoy many wonderful dry orgasms in public without anyone knowing. I lost that ability at some point.

I've recently tried to relearn how to do it, but I've only been partially successful once so far. Unlike the super-intense PC orgasms I enjoyed as a kid, this one wasn't very powerful. The feelings were intense at first, with lots of mini-peaks during the build-up, but the orgasm abruptly stopped just as the big release was about to happen. That was more frustrating than pleasurable. All of the other times I've tried, I just get to the edge & stay there. That drives me crazy after 10-15 minutes, so I end up finishing manually. I'd love to experience those great no-touch orgasms I remember from my childhood again.

Yes it is possible. I have done it, shot tons of cum, feels amazing.

Got really close once, but doubt I could get there again now.