(emerson) I know this is difficult, but it's a romantic fantasy that people are going to "get" this up front. However, once you practice this sex with them, even if they are not, the magic happens. This is my preferred recommendation these days. Open mindedness happens when you are the example. Expecting to find someone already into this is like impossible. But someone receptive...well that's different.
I was watching a show from the UK called Fleabag, episode 2, and it actually addresses Karezza and lovemaking versus "fucking"...first time I've seen someone in a show get this right and address the issue. Point is, though, that you first meet someone, then you have sex, and you don't orgasm, and they get intrigued, and things evolve. That's how I see it. Anything else is doomed.
The worst way to explain it to a man is to say "it's like sex but you don't have an orgasm." Who wants that???? I also don't like the "affectionate gentle intercourse" angle, as that never seemed appealing when I was on the dopamine train. But if you say "you prolong sex, have lots of sexual intercourse, and delay your ejaculation for a long time and sometimes don't even bother ejaculating so you are always ready...and you get this amazing sensitivity and pleasure throughout your whole body" that can sell guys. Or at least the right guys.