How to last longer

I always feel that my wife is enjoying sex the most right as Im about to cum..but how
can I delay that feeling? She likes it when I flex my ****, it gives her a similar feeling as
when Im about to cum but the problem is it speeds up the process..

I can orgasm several times in a row, and usually after 2-3 times she wants no more,
but if I could only last longer maybe I could give her a giant orgasm out of it..

Ive been thinkin about trying two condoms at once...
masturbating a few times throughout the day might help as well..any other ideas?
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