How Old Is Too Old?

I study the little poofy ponytail in the mirror, the same type my hair has made since I was a little girl. The apartment is warm but I have work to do, vanity be damned.

I notice that my once-prominent cheekbones have softened my face into an oval, my dark hair now colored a lighter shade of brown to more effectively disguise the greys. Am I too old to be seen with a ponytail?