Device shifting off the body

Hello everyone. I’ve just joined the site and know quite a bit about this topic, but I’m running into a slight problem that I hope someone can help me with:)

Right now, I’m wearing an Lori 18B with a frenulum piercing and am uncut. The issue seems to be that whenever I get aroused and harden up, the entire device shifts away from my body, putting strain on my testicles and causing significant discomfort. Is this normal behavior? Or is it meant to happen like this? After chatting with Ms. Lori and a few others, I got the impression that getting an erection while wearing the device isn’t supposed to be possible. Am I right???

I can only squeeze one finger between the ring and my skin. Does that fit correctly?

When soft, the cage fits tightly enough so there’s no tugging on the piercing, making it easy to pee. Should there perhaps be a bit more room for movement?