I've found the secret to the male multiple orgasm. Seriously. With this I've regularly had three in a row before ejaculating once.
Particularly, get in a warm shower, and let the steam get thick. Put some Vaseline or really stimulated lubricant on your penis. You might want to get down on your knees so you won't fall down, it's so intense.
Start rubbing by using both fists, up and down and twisting in opposite direction (both your fists outward turning on the upstroke, and in towards each other on the down stroke).
Do this at a normal pace until you start to feel the slightest inclination that you are going to cum.
Slow down your stroke and lighten up immediately. Go painfully slow and pretty lightly. At first, it'll seem like you just lost an orgasm, but keep going very very slowly, the slower the better.
Soon your body will continue to shake and involuntarily you will most likely gasp. It is a very slow and intense feeling leading up to orgasm, and you won't miss a second of it. Keep going very very very slowly with the twisting up and down motion and you will have one of the most amazing orgasms of your life without any ejaculation. The great thing is, without any ejaculation, you can go as much as you want. I've done this three times in a row.
Finally, when you do shoot, the feeling is ten times more intense.