O: Open relationship
NOT what this is!
Make no mistake, cucky. You're not in an open relationship! Yes, your hotwife/hothusband can sleep with anyone they want. You even encourage it. But, you're to be completely loyal to them. Not only do you not get to sleep with others, you don't really get to sleep with your hubby or wife anymore either -- the closest you get to sexual intimacy is watching and maybe occasionally licking up cum as a reward.
This is not an equal relationship, which an open relationship would imply. Your hotwife/hothusband completely controls your sexuality. This is very much about putting and keeping you in your place, which you accept is your rightful place. After all, the whole point of this arrangement is that you cannot sexually satisfy your partner, so what would be the point of allowing you to disappoint others?!
It may not be fair, but you love it!