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.
Bought my first cage. My attempt to beat "no nut november" Using it only at home for now... So far so good... But to be fair, it's "no nut", nobody talked about not using dildo's and a fuckmachine to get an anal orgasm...