Chastity and orgasm denial discussion

I’ve tested four cages up to now—two made of plastic and two of metal. Honestly, I can reach an orgasm in all of them without too much trouble. However, this happens even when I’m not wearing a cage at all. I like bondage; being tied up lets me cum with almost no physical stimulation. While caged, I wouldn’t pull out to release myself, but I can hump objects (like a pillow or armchair) and come shortly after. Shifting the cage back and forth works too. I’m looking for a cage that stops this from happening so easily, though I suspect premature ejaculation is the main culprit, along with the psychological side of things. Does anyone else deal with similar problems? How do you manage to cum while caged? And have you found anything that helps prevent it? I want to truly surrender my orgasms, but I’m struggling because I’m often weak and alone for several days each week.