>>938737308 (OP)
All fetishes are permutations of "loss of control." Or "gaining control."
Think of when a person first begins to feel sexual arousal at all. Their bodies are changing, day by day, against their will. Even arousal itself is involuntary and all-consuming. Their earliest sexual memories are all of them happening against their will.
This applies to hairiness as much as it applies to weight gain, or being tied-up in a cocoon made of your sister's panties because she turned into a spider.
When people first beging to feel arousal, they are either growing new and interesting hair, or they are choosing to see women nudes. Adult women. A young man may peek through an open door and see an adult woman nude and his heart will explode. She will have a bush.
Consider also, that hairiness is a much a signifier of maturity, as growing breasts are. "Is there grass on the field? Then play."
Also consider that some people have no cut-off; "I like big boobs." Well how big is too big? "There is no too big." Even if her boobs are as big as the visible universe? "Honesty, they could be bigger."
"I like younger women?" How young is too young? "There is no such thing?" Evena fetus? "Jerking off to that right now, actually."
"I like hairy women."
You see where this leads?