You can't really say that he's missing out due to his cage as he would slip out in the position anyway all the time. The cage is the simple and easy solution for him. He does not need to be ashamed of being a bad fuck anymore.
My wife has stopped taking the pill just to cement the fact that I will remain pussy free,I asked if I was allowed to have a ruined orgasm in the next six months she said maybe but if you ever want to cum in me again you might have to consider a vasectom