I have learned to fuck for as long as the woman wants to, and that may be for hours of repeated orgasms on her part, or cumming together in 20 minutes. Getting older helps. You learn your own body and your total sensitivity diminishes a little. But what I learned to do is sense where I was on my way to my orgasm, not just when I was about to cum, but even if I was just starting the approach. That gave me more time to control it, before it was already on me. I control it by use of PC muscles, speed of thrusting, mental concentration and so forth... If it gets too close I switch to oral, or simply just sink in to the hilt and pause thrusting for a few seconds.
I learned all that by a lot of masturbation when I was young, both alone and with friends and partners... trying to keep things going and going. I suggest you do the same
You know, Fleshlight has a product that feels like a vagina enough to use in training yourself to last. The difference of course, is that the emotional part and the wonderful visuals of your partner are not there, but it might be useful in training yourself.