I am coming to discover that Seth has distinct and different emotional outbursts. I'm still learning all the layers and intricacies of those. We'll have to come back to them at a later date.
One thing we've noticed for sure is that Seth hits himself in the forehead. Sometimes he does it with a fist, sometimes he does it with his palm. It's never very hard, but he doesn't seem to appear he's doing it.
Sometimes it's when he's upset, sometimes when he's frustrated, and occasionally when he's just happy and laughing.
I shall watch this some more, I think.
