Husband just said he demands respect from me

We're both stressed getting ready for a flight home tomorrow.

He said he'd scratch my back if I apologized for my tone tonight. I did.

He started turning around and so I said"Backscratching?"

He said that he wanted me to scratch his back first and that he demands respect from his wife. Apparently the way I said back scratching was with attitude.

This guy doesn't get how freaking sexist he's being, I told him I felt offended and that it was sexist and I asked him how else did he think I would respond?

He just said goodnight.

Ladies and gentlemen, can you explain this in a way that will help him get the point?