It’s no secret that many men have an easier time reaching the highg than many women. That, coupled with the fact that premature flow is the most common disorder in men under 40, means you may frequently find yourself unsatisfied once he’s finished. It can be a real let-down to realize his fun is over before you’ve hardly started.
While you could get him to finish the job by some other means, another solution is to help him last longer in bed.
Here Dr.Promodu explains about it in very detail. Very informative video