My wife finally wants to lock me into chastity. The only problem is I cannot get it on. I get hard way too fast then my head won't fit in the cage. When I do get it on and locked it acts like it is going to fall off my cock. I have tried the 2" and the 1.75" and it acts like it will fall off. The 1.5" ring is too tight and acts as a cock ring. What do we need to do?