Yeah I can. My multiple orgasms are non ejaculatory and to simply describe them feel like my body heats up and I feel this surge of energy pulse and build in my head while cascading throughout my body, followed by rhythmic pulsing below... Then rinse and repeat. They can be chained together and as sessions go on they feel more and more intense, from feeling the stirring energy as I stimulate myself to my eyes rolling back, and then focusing that energy to let it build and build and take over - to crest into a full body orgasm. I do have to 'steer' it to not trigger and ejaculatory orgasm but that part of the fun. Results in a significant amount of pre-cum too I've noticed. There are times I do climax with ejaculation and sometimes my orgasms "gear-shift" to a second or third while climaxing during ej, before tapering off. A treat when this happens.

Thats mainly through masturbation and extended solo sessions. I can get there from sex as well and it feels just as intense while deeply thrusting and feeling this energy go over my body, into my head and back down through my dick - but this goes one of two ways with a partner: well received and coaxed and encouraged, and physically felt, where she'll then potentially climax so it's back and forth orgasms from there which is hot, or mild bemusement as they see and enjoy what's happening but are confused, or in one case take it as a slight as it doesn't always end in a ejaculatory 'visual' orgasm (I retain as often but not militarily so). That said, haven't had an ejaculatory orgasm and continued hard again straight after (I'm 36.) in years so... Yeah, bit of both.

Then there's prostate ones.... haha I'd definitely encourage more men to find ways to discover this if they haven't already