Another reason might be that a very thin woman will have more wrinkles because there’s not as much fat plumping her skin up. Past the age of 35-40, women start losing muscle tissue at a noticeable pace, unless a weight training program is initiated. How many times have you seen a thin woman of a certain age who looks drawn and not as plump? That’s my theory.
I don’t know why women wrinkle before men, but it’s pissing me off! (46-year old EchoKitty sulks in corner).