David Letterman Shows Off Son's Tee Ball Card, Marvels (VIDEO)

David Letterman took on a moment on Monday night to show off son Harry's tee ball photo. "I know everybody goes through it, but you know, four-and-a-half years ago I was the only one in my house who smelled like I do. And now we got him walking around. He smells just the way I do! Now there's two of us who smell that way! Look at that kid."

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