Smaller children are much more apt to speak their mind in public in a way that many adults would find embarrassing to themselves. But I think it's also an interesting litmus test of the mental level of adults who do the same thing. We know that, as we walk the streets and stores in a kilt, behind many of the smiling faces are thoughts like "nice skirt" and "Where's his purse, heh heh". It's the children and slack jawed adults that impulsively say it out loud. They're like Yosemete Sam... "Oooooohhhh"... they just can't help it!