age limits?

dressing up like a little kitty in a hat with ears and an animal print jacket.
denim mini skirts.
i would normally think that dressing up like a kitten should be kept to the under sixteens. also, i have felt uncomfortable wearing denim mini cut off skirts ever since i turned 23... and would definitely say over 50 is seriously uncouth.
am i stuck in a conventional rut or should these things really be dropped at a certain age?