Excellent subject. A handful of Mistresses I've known over the years have told me that sometimes the strain of dealing with subs who have emotional issues (and physical triggers) eventually create the feeling of burnout with some dominas. Subs release or reveal their innermost feelings, needs, etc. and it can get to Mistresses, no matter their experience. The subs may feel some relief after the session, but it sometimes weighs on the Dominas involved.