It’s easiest to try this technique during masturbation, developing control on your own. But if your partner is willing to help, you can also do it when you are making love.
If your lover does it she (or he) puts her thumb on the frenulum and places her index- and middle finger just above and below the coronal ridge on the opposite side of the penis. She applies pressure for about 4 seconds and then she lets go. The pressure should be applied from front to back and not from side to side.
You can also reduces the urgency to come yourself by placing your middle- and index finger on your frenulum and your thumb on the opposite site. Another way is gripping your penis like the handlebar of a bicycle and exerting pressure on the glans with your thumb.
Before you start intercourse you or your partner squeeze three to six times before inserting the penis. After insertion you should wait 15-30 seconds, get the penis out and squeeze again. After that you can insert the penis and thrust slowly.
If you get more ejaculatory control you can leave the penis inside the vagina and let your lover squeeze at the base of your penis. This can also be done during intercourse. Firm pressure is applied for about two seconds and then released. This must be done from front to back (squeezing the sides does not help)..