It depends on how confident you are in yourself.
Whilist your legs look good there is no matter of the age.. Some people have to be banned of wearing short things though
None of the above. Who's got any right to make rules about such things? This reminds me that I saw Eartha Kitt on a TV show when she was in her 80s, and she was still amazing. Don't know whether she wore short shorts at that age, but I hope she did.
if u want to wear short shorts and are comfortable go for it
It doesn't matter show them off if you have them
You could always move to North Korea if you so like such a rule-bound existence.