Do Family, Friends, Co-Workers know you're into BDSM?

I was wondering if anyone close to you knows that you are into bdsm? How did they find out? Do you share your experiences with them?

Once upon a time I was at a convention with a female business associate who happens to be vanilla in nature. Somehow the topic of handcuffs with sex came up and she asked me if I ever did that? Then I shared with her my life as a domme. I told her about a few of my subs who are into it. We then talked and joked about some of the stories I shared.

Kindly feel free to share yours.