"Keep your mouth shut....."; I remind myself over and over again. Unsolicited advice is just that, unsolicited. Put a sock in it, Kate.
Pity that when advice is requested it seems to be about trivial issues that matter not in the long run, silly stuff that shouldn't occupy the mind at all. The big stuff is less often, or virtually never, the topic open for advice or input.
How many times have I been reminded in the last few weeks that my advice was not requested and is not appreciated?
All you parents out there with young ones; it will happen to you too. Eventually.