I've never had any work done.
Not sure if I ever will.

I am lucky in that I have a full head of hair.
And even at 49 I only have a grey mist.

To each their own but if you are under 40 I am not sure what work you would really need.
That being said... I wouldn't hold it against you if you had work done.

Just do be careful... I know of way too many good looking people who have done too much.
There is something to aging gracefully.