I agree, though I think a part of it is family issues as well. I talked with my sister when I first found out, and her reaction was "You know the things he wants to call you in bed, right?" and it was like, "You think that's all he wants to do??" But it's not something I feel I can really discuss indepth with the people who are closest to me. One of my closest friends, who has even dabbled with BDSM had the reaction of "You need to get out of this relationship before it turns abusive" and it irks me that people assume just because you're in a BDSM relationship it means you're either a victim or an abuser.
Even though I *know* all of these things and don't think what I'm doing is wrong, it doesn't evoke good feelings to know I have to hide a part of myself from friends/family.
After our last session he did ask me if I wanted to talk about what happened (it was the first time I'd been 'punished' for not doing what he told me to), but I told him I wasn't ready to talk about it yet. I find it very hard to articulate my feelings to him, especially when he is right there. I do think it will get easier to tell the different between "real" and "play", I think it's just that, when no one's ever done that with me before, my gut reaction is to think he means what he's saying, whether it's in-session or not.