I had a partner who was really into that kind of stuff. Basically they wanted to “train” me to cum on command. That involved a fuckton of edging, ruined orgasms and blue balls. But it was worth it when we got to the point where I could be brought right to the edge, and if they snapped their fingers I would shoot my load and if they didn’t, I would not. It was incredibly hot.
The ultimate goal/fantasy was to me to have a fully touch free orgasm where they would just start counting down and upon reaching zero they would snap their fingers and then I would shoot. I dunno if it’s actually possible to archive something like that. I was getting good at holding back until the snap, but getting close to the edge in the first place without physical stimulation was still impossible for me.
I was a little worried how this kind of “conditioning” could affect possible future relationships. After that relationship ended, cumming normally did feel weird somehow and more like a ruined orgasm but luckily things returned to normal after a month or two.
Have someone force you to do it. It will be much more fun that way!
Or milk some precum and start with that.