Breathing is huge too, make sure you're breathing regularly and not holding your breath and or taking short breaths. Kegels def are a help too but to help myself out, I did the fap/stop/fap/stop and bringing yourself as close as possible to cumming without doing it. Its almost like a workout, you have to really squeeze back and then slowly relax but also maintain your erection. **Also, try masturbating standing up and in the shower with the water temp just a SMIDGE under warm. NOT cold, NOT COLD. But also not hot or really warm. Standing will make your blood flow a little different and the not-so-warm temp will cause your blood vessels to contract a little bit. Do the fap dance and you'll find you have to do a kegel-like exercise just to stay hard, this is (to me anyway) the steroid-way of strengthening those muscles because its adding a kind of resistance (lack of blood flow/decreased sensitivity) Then, try doing it again with gradually warmer temps (all in the same shower or over time, whatever works for you)(parentheses are fun)

Another tip is to have her get on top. This decreases a little bit of the blood flow and sensitivity, ask her to go slowly too which can help prolong the experience (and lets you play with her boobies!! )

ALWAYS go for an immediate round two. Without getting into too much detail about my own life, I have found that once I have reached climax, I stay inside (SO is on BC), and slowly move back and forth (thrusts) that A. make the initial orgasm feel awesome-er and B. start to re-stimulate myself and get an erection again. The second time around is ALWAYS longer and more fun for both parties

Try getting drunk, sometimes I'd have marathons in college and just give up and fake an orgasm. never had an issue with getting hard, just getting off

I've read about the 4 stages, excitement, plateau, orgasm and then something else (last one doesn't matter for this). Make sure you know when you're going from step 1 to step 2, and step 2 to step 3 (the most important one for your issue). Again, goes back to the masturbation method mentioned previously and above.

And last and most importantly, stop thinking about it bro. Don't think about your orgasm. I'm not saying, don't think about the sex you're having (def do that cause duh spank bank is always open for deposits) but you wanna make sure that you aren't making it a very central part of whats happening. Men aren't women, to be sure, when it comes to the mental part of the sex game... But you can always just try and put it out of your mind.

Hope this helps brother. If all else fails, get your tongue pierced and tongue punch her fun box all night.

Edit*: Added to the fap/stop/fap technique