Chastity and orgasm denial discussion

(Posted in the wrong section originally. hoping this is correct) Hello everyone. I’m relatively new to chastity, though I haven’t worn my current device very often. It feels a bit small, and maybe even heavy too. Since I’ve rarely seen anyone with an erection while wearing one, I’m unsure if what I feel is just “okay”.

So here are some questions:

• How can you tell the device is too small?
• What about tightness? Is it too tight?
• When the inevitable happens and I get erect. The entire cage gets pushed back, stretching my whole package tightly, becoming quite painful after a few minutes. It seems like I’m getting a normal erection inside the cage; it pulls on and stretches my scrotum, so basically I have an almost fully erect penis with just the cage at the end…umm…is that supposed to happen?