When you wear my collar, you represent me.

In preparation for a visit from another Mistress, I ready my owned submissive with a training session. He will represent me in the best way possible in front of other Dommes & Disciplinarians; or he will face punishment.

I have him learn three slave positions which will be called on throughout the visit, when I do not require use of him. The first of many training sessions for him, I should think.