I've been experimenting with prostate massage (very occasionally ) for quite some time, about 10 years now (I'm 30 now). Just recently figured out how to make it feel good. Even had a wet orgasm from manual stimulation with the njoy pure wand, which is when I really started getting the hang of it.
Problem is, if I use the Aneros or Nexus Revo Stealth, I eventually become fatigued just when it starts to get good.
My back and neck muscles often are clenched because I don't know how to relax them while I'm focused on other parts of my body. Is this normal or is there a trick I'm missing?
I eventually will have back and neck spasms, and heart(?) spasms and will start feeling weak. I won't be able to finish. I worry I am even putting too much strain on my heart because my heart will be working overtime for quite awhile up to this point. Normal masturbation does not do this to me, but that's because the orgasms are much shorter and therefore less energy required.
I'm pretty light weight, about 5'7 and 130 lbs. Diet, sleep, and exercise habits not good on a consistent basis. Obviously I should be better about that but I'm trying to understand the problem better, as well as my own body.