''men and women should dress according to their age''
Nowadays it's easy to find a woman on in her 50's wearing a leather mini skirt or a man on in his late 40's wearing loose ripped jeans. The way I see it that's due to the fact they refuse to get old and they try to look younger with unapropiated inappropriate clothes. They have to realise that there is a perfect look for each age.
You may express yourself through your clothes but sometimes I wonder where are the limits are? For me the view sight of a middle-aged woman wearing mini shorts and a crop top it's is not nice, but also it depends on her figure. Getting older does not mean that you stop wearing bright colours, but some clothes and accessories should be avoided from a certain age onwards.
In my humble opinion you don't have to wear boring and dark clothes just because you are over 50 onwards. The only thing you have to do is to feel comfortable adapting your look to your age and you may look stylish and fabulous!
Very well written! My comments in red are corrections. My comments in blue/gray are suggestions.