Plainoldme, I have a good example of your principle that perversion is in the eye of the beholder.
I used to have a friend--a real cut up--who boasted that he could spot a "homo" a mile away. He was always identifying various individuals as gay. One day I challenged him with the question: You say you can always tell if someone is gay. I challenge you to tell me HOW you do that.
He answered: "By the sensation he engenders in my loins."