I think I have always been in relationships where I took the more submissive role without knowing the term FLR.
I got into one with a girlfriend where she began telling various she was obedience training me and formally disciplining me. I was not used to it but it began to seem natural to me. I liked the limits she set, the way there was no arguing. I really think it made me a better man. Probably be good if a lot of women had and used that power.