It’s actually possibly to learn how to stay hard. Can’t say if anybody can do that, maybe person needs predisposition for that. But I did after some practice.
Idea is simple, once body feels it’s enough, dick goes limp. The only thing you need to do is to stay horny. And I mean some inner urge, because there is huge difference between “I want MORE!” and “would be good to stay hard”. For sure, I’m not expert in this area, but I’ve noticed few facts during self exploration which helped me:
1. Way to cheat is half-orgasm or dry orgasm. Amount of cum plays important role, because if your balls are empty then it’s going to be hard to convince body to continue. Don’t forget, reason for sex is reproductive instinct.
Technique isn’t very hard. You just stop stimulation right before you feel it’s impossibly to stop. As result you get orgasm without both physical and emotional finishing, but full contraction process. After some time you ll notice pleasure and orgasm are different things. Without a doubt, peak is ejaculation, but you can feel pleasant for hour or hours without finishing. Or you do double half-shots and sensation is going to be even stronger. Two things here is stockpile and getting used to staying hard after contractions and that’s already half of your goal.
2. Sensitivity. As I remember, long time ago after orgasm I was quite sensitive. Once I just noticed I don’t feel anything unpleasant if I continue to masturbate in slow tempo, I got curious about that and actually got my dick hard again. Was surprised, because didn’t expect that at all. I even could ejaculate after 15 minutes, but it was a bit tricky, because few times I got half-limp. For sure, it’s important step, because stimulation should be completely pleasant. Find way for that. Maybe tempo, maybe type or stroke. Maybe something else like water, temperature or simply train it for hours to reduce sensitivity, but get other source for desire.
3. After that you need to start to think about first ejaculation as small hill in climbing mountain. Not as something disturbing, but on the contrary as springboard.
Can’t say much about multiple shots in single day. Maybe it can help. There are many other small tricks too. I just focused attention on most important steps in my opinion. Fake double shots, true double shots with hard-limp transition and proper double shots. Despite that’s way how I got that, I’m quite curios if it’s possible to learn directly. I assume should be the way for that. Not to break and recreate process, but overcome with something pleasant. But that’s already a bit offtop with just wild guesses. Also at the end don’t forget, person has 2 refractory periods. How long to make it hard again and how long to get desire to do that at all. Sometimes person just needs to take few days or week break to refresh whole body and build feelings up.