perverse

Any man who succeeds in diverting the public taste, or in turning back a perverse stream which will flow in the direction of the ditch, leaves a mark, as it were, and cannot be overlooked by posterity.

Looking at Barbara one would have considerable difficulty detecting a perverse side to her nature. Her expression was demure, shy, and apprehensive. But she recognized the demonic aspect of her personality and admitted it.

I felt most alive when I felt most perverse. At college, sleeping with boys had a perverse quality. I slept with a boy friend of one of my girl friends, and I was proud of it. I bragged about it because I had done something perverse. Another time, I slept with a man, fat and ugly, who paid me for it. I was very proud. I felt I had the ability to do something different.

[The researchers] noticed many of their pieces of [plastic marine] debris sported surface pits around two microns across.[…]Closer examination showed that some of these pits did, indeed, contain bacteria, and that in several cases these bacteria were dividing and thus, by the perverse arithmetic of biological terminology, multiplying.