How it is possible for man to have a longer lasting sex?

How it is possible for man to have a longer lasting sex, so I wouldn’t ejaculate for at least 20 minutes? (Male, 28 y.o.)

There are necessary special trainings for that and they may take up till a year. This process in most of the cases is already developed and stabilized reflex which has to be changed. You have to take into account that - the longer it’s been like this, the harder it is to correct it, though it is possible to do.