I have a theory after observing some old folks getting senile (having hearing problem, unable to discern things, etc.) Be it pride, psychological struggle, there appears to be one common factor: That they talked more than they listen.
I compared an old lady in her 80s to our Prime Minister in his 90s. Big difference. One is sober while the other claim senile. I wish to examine this further, on what it is exactly, this being senile.
You talk more than you listen. You want others to listen to you. You don't want to listen to others. You don't want to analyze what others are saying. You have "learned" to not focus, not pay attention at things.