Be sure to speak up. All aspects of treatment can be modified to your taste: amount of light, kind (or absence) of music, temperature, and whether or not you choose to have a conversation or enjoy the treatment in silence. If you want the therapist to give you a deep massage, or be gentler, let him or her know. Also, feel free to ask questions. Your therapist will enjoy knowing your thoughts and clarifying any issues you may have. If any part of your experience is unsatisfactory, first tell the therapist. If the response isn't helpful, speak to a manager of the spa.