Following the words in the song, touch your toes, knees, chest, head (for "nut"), nose, eyes, heart for "love", and point for "you."
Tony Chestnut knows I love you. (toe, knee, chest, nut, nose, eye, love, you)
Tony knows. (toe, knee, nose)
Tony Chestnut knows I love you.
That's what Tony knows.
Do this slowly at first--it's hard!--and then faster and faster until it's almost impossible.