I'm a guy and i frequently masturbate without cumming
Like most guys, I masturbate on a regular basis although not every single day. However, I rarely ejaculate.. I actually will consciously stop right before I'm about to cum. The only times I'll actually cum is during sex, if I accidentally go past the point of no return when I'm trying not to cum, or if I haven't cum in over a month (to keep my balls healthy, hopefully.)
My wife and I are living on opposite coasts due to our work so we only have an opportunity to see each other once a month (without spending a ridiculous amount on plane tickets). I'll even stop this jacking off without cumming business a week before we see each other so I don't accidentally release right at the most inconvenient time.
Yes, this takes some discipline to pull off.. but it makes for some amazing sex once a month when I actually get to see my wife.. not to mention having much more energy than usual when I go exercise at the gym.