I didn't even see that other stuff on the shelves - You may mock but this did happen to me.
About 10 years ago I was hanging around Victoria rail station waiting for a train I wandered outside and came across a bookstore.... In the windows were ordinary books, fiction non fiction.
I did notice that they looked a little faded but so what, they may cheap.
In I walk, straight up to a rotating carousel flicked through looked at some of the crime books... Then I became aware that every one was watching me.
Looked up and saw piles and piles of adult mags, boy was I preying no one I knew would see me leave.