the.com/perversion

means A turning away from what's considered normal or natural, especially in sexual desire or behavior — though the word carries a heavy moral judgment it doesn't always deserve.

from From Latin 'pervertere' — 'per' (thoroughly) plus 'vertere' (to turn) — meaning literally 'to turn around completely' or 'turn the wrong way.' The same root that gives us 'vertigo' and 'version.' Originally it described any corruption or distortion — of truth, of justice, of doctrine — and only later narrowed, especially through 19th-century medical and psychiatric writing, to mean sexual deviation specifically. The word didn't start in the bedroom; it just moved in and redecorated.