Are you able to orgasm without ejaculating? I believe ejaculation is depleting even for very healthy men but you can learn to separate the two.
I was a student of Mantak Chia’s work years ago. Back in my 20’s I was finally able, after a long time of serious practice, to master the “Big Draw”. It is a process for males and female where nearing the point of orgasm, you do a series of full body muscle contractions combined with breathing coordination and mental focus. The object is to reverse the direction of orgasmic energy. Normally it is focused out of the body through either the penis or vagina. This is a huge loss of energy for both sexes. The “Big Draw” trains the body to orgasm without loss of energy. Rather the orgasmic energy shoots backward and up the spine. It takes an incredible amount of time and focus to successfully execute, and it is a lot of work to actually do the technique as well. Not everyone who practices is lucky enough to attain the proper outcome.
If you can achieve this, then you can go on to lots more practice in training the body to employ the reverse orgasm just with mental focus, and no longer have to work the ridiculous full body muscle contractions with breath coordination, etc.
I did manage to accomplish both, which was amazing really. My wife was able to as well. To be able to move the point of orgasm to other regions of the body is truly an amazing experience. However, after I was poisoned in 05 I slowly lost the ability within about 6 years. And now with a more severe level of ME/CFS, the though of sex is exhausting. It’s a cruel aspect of this disease, for anyone.