Where you realise you need to do things while your still young and healthy enough to do them
Often you start to regain some freedom after many years of raising young children and building
You no longer tolerate bs
You dont waste time on people and things that arent worth it
You are so much wiser
men stop hassling you all the time
I an understand why they used to call it the change years ago, as you really do change so much in your 40s