There is this thing that happens in photography, (particularly in porn) where the magic veil of the medium is pierced and I realize that what I'm actually looking at is; a man paid a sex workers to take photos of her in a cheap hotel.

Why though? Why does the illusion hold sometimes but not others? I have the vague sense that it has something to do with the depth of field, but that's not all of it. I can't quite put my finger on what exactly causes it, but I've definitely experienced it quite a few times looking at photos. Any thoughts?

I really want to know because it is currently the major fear holding me back from doing shoots with women. I don't want this weird uncanny effect showing up

(censored because /p/ is a christian photography board)