If I understand your point, Hoshin, it's a pretty good one. How the helper's role is communicated to students can make a difference. If he heard the instructor say, "Keep an eye on the kids" or "Check the kids", he may feel like she's stepping out of bounds (though she isn't). It could be a matter of perception.i understand what you are saying. i know the culture of a traditional dojo. but i think the one factor that may be over looked here is that in general she was not tasked to instruct adults only the kids and teens and this is an adult student. that makes a big difference to the "guy" and how her instruction is received.