Body Odor.
All the females in my life friends or intimate i have ever asked about this when these articles appeared (this isnt new) always respond with "Ew, disgusting bitch" when they hear other females dont shave etc.
They always complain about shaving and everything obviously too but they will always do it cause of their own reasons.
Mostly the hygiene, feeling smooth etc etc is their reasons.
Never what other think, its 100% about personal hygiene.