Lay in bed on which ever side is most comfortable, with your knees bent and together. Now lift your upper leg up, and with one hand reach around behind your butt, grasp both of your testicles and stretch and pull them toward your butt. Lower your leg down so your penis is on one side of your legs and your balls are on the back side.
Slow and easy, straighten out both of your legs, squeezing them together as you go. This will pull on your testicles and make your penis as hard as a rock.
Spread a towel beside you, and under your cock, and position it so that when you ejaculate it will catch your semen. A sock slid over your penis works great also. Both make for easy clean up.
The technique is to bring your self to ejaculation without ever touching or stroking yourself, and this is how it's done.
Squeeze your legs together clamping down on your balls. Now stretch out your legs, which pulls back on the testicles causing your cock to become very hard. Try to get your legs completely stretched out. You may have to do a little adjustment to your testicles to get full pressure on your cock comfortably. The shaft and head of your cock should feel like it is stretched and expanded like it's going to pop. Ease up on your leg squeeze and let the pressure off. Now squeeze and straighten out your legs again. Keep doing this in cycles, sometimes holding on the pressure, letting the head of your cock build. Relax your mind and just concentrate on the feelings in your penis. Let the feelings flow.
As you feel the urge to ejaculate coming on, relax the squeeze just a little. With practice you can get to the point where you can get right to the edge and just hold it there by gentle squeezes and releases, letting the waves of pleasure surge through your whole body.
When you go over the edge, sooner or later, just squeeze and stretch out hard, letting your semen squirt, all with no hands. The ejaculations can be quite intense at times.
I usually squirt 6 to 8 times before my ejaculations start to subside. When they do, I then reach down with my hand to stroke my penis, usually to another climax, followed by 4 or 5 more good squirts. I only follow up stroking by hand when I'm alone.
I have used this technique several times when on business trips where I may have to share a hotel room with a fellow employee, or those nights when the wife is just not in the mood, and I just have to masturbate. It's a silent way to pleasure myself and no one knows, because there is no rocking the bed by stroking.
The technique is silent, very pleasurable, and is actually rather exciting, especially having someone asleep right beside you while you ejaculate your load.