“He didn't shout, "I love you!" for example, because self-conscious people don't shout that sort of thing. At that time, however, the Norwegian had other opportunities of expressing himself. He could express irritation or anger by going outside and chopping down a tree, or throwing big stones in the water.*
*As is known, the Norwegian coast is surrounded by thousands of larger and smaller stones (The Skerries). This is very likely a sign that there was considerable irritation during the Norwegian Stone Age.”