I am getting ready for work in the morning, combing my hair, with my wife to my left, applying her makeup.
I have an itch on my back and ask her to scratch it. AS she does, I somehow turn to be able to see my back in the mirror (normally impossible in my bathroom, not enough mirrors.).

What I see in the mirror horrifies me. My back is covered in hair. I have a hairy back!

I ask my wife, "Is my back always this hairy?"
She says, "Uh, yeah." Like it is the most natural thing in the world. Like I just haven't noticed it before, or something.

It was really weird, but it is one of my fears, that I will grow a hairy back.