Not all orgasms feel like this. For me, clitoral orgasms that I give myself via masturbation do not feel like I'm floating, or make me shake uncontrollably for several minutes. They feel like a sharp peak of pleasure and release of tension that lasts about 10 seconds. But after about 30 seconds I could start masturbating again and give myself another, and another, as many as I want.

I think that there are many different kinds of orgasm, and squirting is probably one kind (a kind I've never been able to give myself so far lol). Whatever kind of orgasm you have that makes you feel like you're floating and that "lasts longer", I'm keen to have one like that too!

The only similar experience I've had is when I am really well fucked and it's like I can feel that way as long as I'm being fucked just right. But it's not so much a release of tension then.

I also can experience a different kind of orgasm that I call a wombgasm which is completely mental, if I'm in the right state of mind and empathising with someone who is aroused in a romantic way not just a sexual way, my womb clenches involuntarily, sending a wave of pleasure through my lower belly, and can do so hundreds of times, so long as I stay in that highly empathic state.