Age is a matter of mentality. If you look at a tree that looks fun to climb and you think “too old for this”, you’re old.

If you wanna try something new but “you’re too old for this”, you’re old.

If some kid starts using weird lingo and instead of decyphering it you think “kids are weird”, you’re old. And a hypocrite.

Of course there’s magic number of 60 year old when your mentality doesn’t matter as your body starts being held with glue, spite and will. I mean you can certainly try to be young but…