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Removed Real Life section per discussion and vote on Real Life section maintenance thread.
In some of the Film and such examples, there seems to be some confused overlap between the actors and the characters they play. Maybe a line should be drawn between the character who is supposed to be a Dirty Old Man, and the actor, who may not be anything like the part he's playing. Also, calling real people (the actors) that in real life by drawing attention to their real ages/age gaps, rather than the characters, is kind of rude.
Actors aren't troped, especially not with tropes like this one. Delete all such entries.
Sticking problematic entries with actor vs character tropes here:
There is a song called Dirty Ol' Man by the Three Degrees in 1973.
I think it would be useful to put in some reference to how in manga/anime these guys are often bleeding from the nose.
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How well does it match the trope?