Grampa, there's nothing to do around here. That's the trouble with people your age. You think you always have to be doing something. Try being still, when you close your eyes and just be still, you can hear your own heartbeat. My heart sounds like it's snoring. Zzz.
How come my finger has a heartbeat? Good question, Nelson. Actually your whole body has a heartbeat. That's because there's blood beating through your entire body. Your finger is just a point where you can feel it easily. Does that make sense? Uh huh. And besides, if it didn't have a heartbeat it would turn black and fall off. Earl! What? The kid has to learn these things.