Wedding rings are a sexual/psychological kink for my wife. Before we met, she used to have relationships with married men, cheaters. She said it was because the relationship had built-in limits (men don't leave their wives), they were appreciative, the sex was good, they couldn't complain if she was seeing someone else, etc. I think there was also a strong element of sampling what another woman already had, like eating off her plate in a restaurant. Anyway, Daniela said she liked being with a man wearing a wedding ring, while she wasn't wearing one.
That all stopped when we got together because I didn't like cheating, as well as thinking it is dangerous. But now that she's a married woman and we're swingers, she likes wearing her wedding ring while having sex with other people, men and women.
I don't and never have worn a wedding ring with my ex-wife either, and never cheated.