I'd like to be sure I understand you. Are you saying that what Pearlgem replied is right for all subs? I am very leery of sweeping all-inclusive statements since we kinky folks vary so much. For instance we have no physical punishment in our relationship while for others that's an integral part of who they are.
As to communication that's a given, but that dynamic will vary if the session is part of a long-term relationship or if it may be a first or second time in a new relationship, or a casual play party scene, etc. The methodology of communication will vary.