"Older men" refers to adult males in a later stage of life, often middle-aged or senior. The exact age varies by context and culture, usually meaning men older than others mentioned.
Older men declare war. But it is the youth that must fight and die. Herbert Hoover
Don Quixote is one that comes to mind in comparison to mine, in that they both involve journeys undertaken by older men. That is unusual, because generally the hero of a journey story is very young. David Guterson
Older men start wars, but younger men fight them. Albert Einstein
Just as dyed hair makes older men less attractive, it is what you do to hide your weaknesses that makes them repugnant. Nassim Nicholas Taleb
He looked at her again, now with the vague abject shyness that older men often have with young women, as though asking their indulgence for no longer being young. Stefan Zweig
We Latins make splendid lovers and splendid older men. Cesar Romero