Still referring to the cuckold culture, the dominated husband is sometimes said to put some sort of wedding ring on one of his wife's toes instead of fingers, to declare himself submitted to her willings: she may just be free to cheat on him or become his actual mistress.
The image is watermarked, so I just post the link hoping it's all right with it.
http://img131.picfoco.com/img.php?id...9MbTVsZEM4JTNE