a funny tickling song on a kid's tv show

If you remember puppeteer and ventriloquist Mrs. Sharri Lewis, years ago, she had a kids' show that aired on PBS called Lamb Chop's Playalong. Now you probably figure that this is a show just for little kiddies, but I have to say that Sharr has told some great stories, and her friends Lambchop, Charilie horse, and Hushpuppy were very funny characters. Anyway, within one episode, Shari starts to sing a song about how funny it is that when you tickle yourself, you fell nothing at all. It's like tickling the air, a chair, or living room wall. You don't wiggle around, jump up and down and laugh like you normally would. How strange, but when Shari starts to demonstrate that when you start showing tickling fingers and slowly come to someone and tickle them, that's when you laugh and it takes effect. Sure it's impossible to laugh when you tickle yourself, but what a difference it makes when someone else tickles you. At first, Sharri was having fun tickling the little kids and making them laugh. But in the end, they all gang up to Sharri and start tickling her and she tries to tickle them back, and everyone laughs. It's just one of those things that gets you thinking.