How do you prolong sex?

If you can, use the prescription drug Prozac or equivalent. One of the side effects of this drug is that it is harder to achieve an orgasm and takes more work to achieve it.

Alternatively for both partners, you can use "Numzit" or equivalent baby teething gel. Spread it on the clitoris and the head of the penis. It temporarily numbs the nerve endings so it takes longer to orgasm with no permanent damage. You can use a little or a lot depending on how long you want to have sex.

Also, for a male, the old method of using a condom works at prolonging sex.