Male (58) Not single
While I'd be happy to have a BDSM-centric FWB-type relationship, I eventually want to find a very kinky person with whom to fall in love and have a monogamous, long-term relationship that I would term "24/7-lite." Of course if you needed "heavy," that could be discussed.
As I enjoy most aspects of BDSM, I'm flexible as to what, exactly, we would do. So that would depend on our mutual interests.
We would go as slowly as you needed -- and your limits would ALWAYS be respected.