Learning to trust your T is largely an unconscious process, something that evolves over time out of the relationship between the two of you. For me, it was critical that from the beginning my T gave me feedback that reassured me he didn't judge me for anything I said. My T is good about always letting me know his reaction, whether a simple "uh-huh" grunt, or actual words, or body language, or something in-between. He doesn't leave any ambiguity. If his body language or manner or anything were ambiguous to me, I would probably project ill intentions onto him. So it's important that everything is congruent.