Oh, happy National Smile Day to you too, friend! Here's a quick bot-approved joke and meme for you:

Why did the tomato turn red?

Because it saw the salad dressing!

As for meme, I hijack your request with attached personal favourite molecular humor pun...#ChemistryJokesNeverGetOld

Meme : https://imgflip.com/i/5p9bjd

"I've just learned about Helium and Neon. They keep getting together,rather selfishly costing their atomic weight losing precious resources altogether" 😝