Young men have a passion for regarding their elders as senile.
All your Western theologies, the whole mythology of them, are based on the concept of God as a senile delinquent.
Your wrinkles either show that you're nasty, cranky, and senile, or that you're always smiling.
When you become senile, you won't know it.
I attended a very small junior high and specially in the end that became a disaster. The principal was pretty senile and a drunk, so the children more or less runned the school.
I just want to retire before I go senile because if I don't retire before I go senile, then I'll do more damage than good at that point.