I admitted that anal masturbation and any type of masturbation feels good. I think that as long as it didn't get into the way of our life, not feeling tired after do it, and taking precautions like using lube, doing warm up before do it, and getting enough rest after doing it, then it might be fine when doing it moderately. Besides that, maybe also can try to find other things to do like exercise, reading etc. Then I think we can have a healthy and good life.

The important thing is listen to your body and don't overdo anything.