Basics first. [he has to remind them all that-- not just his fellow "instructor", but also their "students". and he does it without raising his voice, but making sure that they can all hear him and understand him. just by expecting them all to be listening.]

All clients expect a spanking, a flogging, a whipping. It's the most commonly-known expression and practice of your duties. You need to learn how to gauge your client's threshold for pain, and adjust your blows accordingly.

[then he looks at his fellow instructor, eyebrow raised.]

Who will demonstrate, then?