Yes I know what you mean about defining them in physical terms. I draw some similarity to some people that want to get into photographs and don�t resist at all when asked. A bit like the relative in families that�s always ready with that special smile if you know what I mean. Others don�t want their photo taken at all and always shy away from the camera.
It�s the same with Orbs some jump into the shot and others won�t.
Just let them do their thing and see what happens I suppose.
I think they know we know of them though. Agree...?