"You are too old for that!"
And, in a few select cases this may even be true. For example, you may really be too old to hope to be able to run 100 metres in less than 10 seconds, or a mile under 4 minutes (for some, under 30 minutes). You may even be too old to father (or bear) a child. Even if all the systems are still go, it may be unfair to orphan your own child too soon. Nobody lives forever after all.
Some other things we are being told not to do because it "does not become your age" are, if I may put it very mildly, silly. Who is it decides you're too old for that t-shirt? That hat? You can look silly in either or both, true, but that has nothing to do with age, does it? In most cases you'd have looked silly in them at any age anyway. Then there's "acceptable" art forms to enjoy, and pastimes to indulge in. The list of examples is, well, endless. I'm sure I'm too old for this blog, too!
So, is there anything that should be done about this? There is no doubt something must.
My suggestion, and personal approach, is to just shrug it off without looking back. Do you enjoy shooting monsters while on the train even if you're well past forty? Go and buy that Sony PSP and knock yourself out (or better yet, some Nazis). Just make sure you use headphones or a SWAT team may board at the next stop! Did that t-shirt with a silly slogan, and even sillier colours catch your eye? Buy it, and wear it proudly, even if you're sixty (or even sixty-four)!
Finally, what to say to all those who keep telling you're too old?
Well, you can either just shrug them off, too, or tell them they're way too young to be so serious about things! And for their next birthday buy them something to make them cringe!