I've actually never seen this technique posted before, so I thought I'd give you all a new thing to try out.
Now before you try this out be sure you haven't played with your cock that day, are really horny and have some 'visual material' handy.
The point of this all is to touch ONLY your balls. Keep your cock from getting ANY stimulation.(Trust me it'll be worth it.) It might take some time before you start feeling good, but keep on petting and tickling those balls.(Don't squeeze or cup your balls as that just doesn't give enough pleasure, at least in my case.) Paying special attention to that very sensitive ridge running along the bottom-centre of your balls.
It might take you minutes to get hard and between 20 and 60 minutes to get close to cumming, so don't be discouraged if you think it's taking too long. When you get closer to your orgasm your cock will start to twitch, but unlike normal masturbation you don't need to stop yet to prevent cumming. Just keep going, your cock will now completely harden.(it's probably harder then ever before)
All you have to do now is STOP. Yeah stop and just look at your hard cock, it should feel great now even though it's a strange sensation at first.(When you get more experienced you can get even closer to orgasm before you stop and also use the 'stop and go' technique to get close to orgasm over and over.)
Now for the best part, touch your cock, VERY LIGHTLY! Make sure you don't orgasm yet. That feels incredible doesn't it? Your cock is now more sensitive then ever before.(At least i don't know of a technique that'll get me this sensitive.) Just keep on going till you just can't stand it any more and CUM!
Now there are some variations you can add to the end. You can use a artificial pussy to get you over the edge instead of using your hand. You can also keep touching your balls and never touch your cock to get a very frustrating orgasm. Or get yourself over the edge and then totally relax. Letting your cum just dribble out. Whatever you like. Try it!