I get massages on a regular basis. Only one time where I lost it and cried in front of the therapist after the session.
It wasn't CSA related. My former employee drowned at 26, and I had just learned about the news a few days prior to the massage. I'm not a crier per se, and I usually like to shield my emotions. However, I thought of this employee like a kid brother, and it was difficult to know that this little "rock star" passed away. He was very charismatic, good looking and he knew what to say to people to make them feel a little joyous in life. He was also very humble and a true gentleman. He was respectful to my family and me. So it just felt that the wrong person was taken away so early in life. Long story short, the therapist understood. I collected myself and got dressed.
Point is, some intense massage treatments can do that to us depending on our emotional state at the time. It's the body's way of purging tension through the release of tears.