For what it's worth, I shared with my T yesterday the details of the agreement between my wife and I in our "open" relationship. She thought it was great that I was able to say what I could and could not handle need wise that would keep the relationship safe.

We've talked a bit more about BDSM. At one point when I was struggling around some concepts, I saw a 2nd T for 2 or 3 sessions that is active in the BDSM world. I thought talking to T about it would cause problems with my transference. Ultimately, it was my T that was able to help me connect the dots to what was going on without really talking about BDSM. I think this was because she had more knowledge of my history.

I do think it might have interfered with the transference. Not sure though.