Boundaries
A conversation about internal & external boundaries deserves a great deal more clarification and examples. In many ways, boundaries goes back to systems theory: our boundaries are a necessary part of our system (whether singular or plural).
For example, no matter how flirtatious your client is, it's your job to create and maintain clear boundaries with regard to their behavior and not to take it personally.
Pushing Boundaries
Future note: Headmates who push boundaries and why they do it. (So scary. So Healing.)