I couldn’t get one to work, but the penis is very flexible and squish-able and there is a bit of room for it to hide. There is probably a little more room than you think there is to, you can play around and see how “inverted” you can push it without it going all s shaped. They probably work better if there is some fat to hide everything in. A well fitted cage is actually comfortable, there is no pinching, just a uniform light pressure if things need to be held back. I love that pressure.