Gosh, that's a tough one. It is really hard to bring up things like this. I personally am very sub and turned on to the idea of BDSM as well and I've hinted for years but, in having long, heart-to-heart conversations with my husband, I find that he just needed more info and detail. And I guess I was ASSUMING that all my little hints about leather and bondage were enough. Honestly though, it was really not fair of me to expect him to read my mind. After talking about it, I found that to someone who's never gone into it in any manner whatsoever, it is indeed very daunting, and there are so many directions to go with it - where would he start?
So, it's become a great, hot new project - along with getting into the med fetish as well. I think the two worlds actually can go hand-in-hand very nicely.
So, perhaps have a few drinks, get into a hot little discussion of "What is interesting for you? What is interesting for me?" and see how it works?
You might have to end up being the Dom to get this going. And yes, I know how hard that is. It's hard for me but once I get into character, it can be great fun too. It just takes a lot more mental prep for me - it doesn't come naturally. But it is still very hot, actually.