True. I would just like to add that it goes both ways and that subs should be mindful too, both about what they are asking for and if in a relationship, what they are asking from their dom too (doms get hurt too).
Submission too is mind-blowingly enjoyable (i like that expression) and it can be easy to get lost in a fantasy. We all have a responsibility towards our partners, but ultimately our own welfare is our own responsibility, no matter the role we play.