IMO
attitude, and emotional stress
I'm 48 and I don't feel it, act it, behave like I am, or anything. (except for a recent health problem that fixed now)
My friends are for the most part, on average 10yrs younger than myself. theres a few my age but they look older(ish)
My BF is almost exactly 10yrs younger than myself,......he's nearly all gray, aches and pains, creeks and cracks, bad posture etc. It probably doesn't help that he is kinds tall and skinny, and doesn't exercise.
I will admit that I've got some eye creases/ wrinkles though (crows feet) from smiling alot.
I still likes to have fun, ....and
yes I kick but at video games.
(30+yrs experience) LOL
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"I feel as if I am walking in the rain, everyone else has an umbrella,
but I do not. I am soaked to the bone and shivering from the cold."