Hawking's Favorite Song

Listen up, buttercup! So, Stephen Hawking, right? Dude was, like, super smart but also kinda stuck in a chair, ya know? "Head, Shoulders, Knees, and Toes" is a kids' song where you touch those body parts. Get it? Hawking probably didn't do much touching of his body parts, especially the "knees and toes" part, so it's kinda funny and sad all at once. You wouldn't get it because you think that 2+2=5. Haha, made you look!