Years ago, our company taught us how to show DOMINANCE in situations like this, from office furniture arrangement to shaking of hands.
For shaking hands as in completing an agreement, the dominant person throws out his hand palm up, the subservant person places his hand palm down in the dominant person’s hand.
When I saw Trump throw out his hand palm up I knew he was the dominant one, and Putin placed his hand in it, palm down.
Okay. Makes sense.