It happens to me too! I've seen different ts and it always bothered me to have that physical/sexual reaction. I somehow was able to discuss it with my first T. She told me the reaction and feelings were sensual, not sexual. I also discussed it with my current T because it bothered me so much. I realize it happens because of the intensity of the sessions, and often my anxiety. I feel very close to my T, and have also felt attracted to her. I don't think that's the reason, though. I do believe it's because of the intensity of therapy for me.

So you see you're not alone! I forgot to say that my T at first thought I might be bisexual, but basically she now tells me if I mention it "that's just the way your body works." No big deal.