It sounds like you are in the process of learning how to listen to your body and it will tell you what it needs. I put some DMSO and Iodine together and put it on my anal sphincter to see if I could stop an itching hemorrhoid. It worked, but I had a really crusty sore butt hole for a few days. It was almost like a scab. Be careful on tender tissues is my advice. But yes, DMSO will carry things into the body. I think you are on the right track and nobody here can probably give you more insight than you own body can. We can only guess like a bunch of quack MDs would do. You go to ten of them and you get 10 opinions. You have narrowed it down to two possibilities. You have a fifty fifty chance of getting it right if you guess right. If not, guess the other and try that. I don't know what all they do for testicles because I don't have any and I've never looked it up. Sorry for butting in when I have nothing valuable to contribute. Keep up the good work.