Novices and newbies discussion

I’ve acquired plenty of cages over time. Most are either too loose, or while they feel comfortable initially, I still manage to get erections. This has been a on-and-off journey for me spanning roughly four years. When the erections happen, my shaft reaches about 4 inches; at rest (flaccid), it’s around two inches. I worry that my size might be too small to maintain long-term chastity. Plus, when an erection occurs, I can grasp the cage and slide it up and down enough to trigger orgasms. What options do I have? Any advice would be welcome. The picture shows a bar designed for ball support. I also own another model that is slightly smaller.