I have never met a single person who, when asked to ‘relax and look natural’ in front of a huge lens pointing in their face, takes a photograph that actually represents their character in some way.
Nor have I ever met a child who will sit still for a photograph.
At least, perhaps they will do for a school photograph. But that’s a school photo for you: well-lit mugshot at best.
But as for any other portraiture of children, they won’t sit still.
I therefore find it takes the stress out of photographing boys when you work with them rather than against them…