“Cheeseburger in Paradise: I think it is *actually* about cheeseburgers. It is the one song that is not about love *or* drugs that I have encountered. Prove me wrong.”
Thermonuclear war is a big third category.
“Name me a couple about that.”
99 Luftballoons, We Didn't Start the Fire.

Sex, drugs, and rock & roll.

“Is Forever Young about drugs or sex?”
Thermonuclear war.
“I guess that makes sense. Maybe.”
I'm not even kidding. I would have said thermonuclear war no matter what song you mentioned. But, it is.