I'm wondering if you have "hidden" feelings about your T. (I don't know your genders or your true feelings toward your T.) this is just a hunch. Dreams to me are usually an indication of our subconscious minds feeling something deep down that we are reluctant to feel in real life. Possibly this is something that got triggered from a past T. session? I think it might be a good idea to bring it up with your T., if your bothered by it a lot.