Now listen to part of a lecture on this topic in a psychology course.
Last month my favorite uncle paid me a surprise visit.
I hadn't seen him for many years.
The doorbell rang, I opened the door and there was Uncle Pete.
Now I am sure when I saw him, I said something like "Uncle Pete, what a surprise! How nice to see you!"
[pause] Anyway, my wife was standing next to me, and according to her, I wasn't really aware of this, my eyes got really wide and I broke into a huge big smile.
She said I was actually jumping up and down like a little boy.
Well, anyway, later that evening Uncle Pete told me how very very good he felt when he saw how happy I was to see him.
But compare that with this, my daughter, she is six.
We were building a birdhouse together last week.
And I was showing her how to use a hammer and nail.
And of course, stupid me, I wasn't being very careful and I smashed my thumb with the hammer.
Boy did it hurt!
I almost felt like screaming, but I didn't want to upset my daughter, so I said, "Don't worry, honey, it's nothing."
Meanwhile, I was shaking my hand as if that would stop my thumb from hurting, and my face was contorted in pain.
My voice was trembling too.
So even though I told my daughter I was okay, I'm sure she didn't believe me because she kept asking me if I was okay.