During intercourse many guys come too quickly. The stop/start method is one way to improve ejaculatory control. It’s an exercise you do when you masturbate. How does it work?
Become aware of the sensations leading up to orgasm. You must learn to identify the point of no return, the moment you know orgasm is inevitable, whatever you do. This occurs a few seconds before the actual release.
Stop masturbating as soon as you get too excited. If you rate excitement from 0 (no excitement) to 10 (orgasm) you should stop somewhere around 5. Don’t wait till you are close to the point of no return, for then you’ll come. When you develop more control you can stop at a higher number.
Stop long enough to let the urge to come completely subside, but not so long that you get bored/lose your erection. Normally this is between 10 and 90 seconds. During the break focus on your arousal and take a few deep breaths. Then resume stroking your penis. Repeat this procedure if necessary and allow yourself to come after about 15 minutes (including stops).
At first you might have to stop many times. But if you continue doing it, the number of stops will decrease. If you need only one or two stops you can increase the level of difficulty

Increasing the level of difficulty
Applying the method during lovemaking

See also: premature ejaculation