Movies
Modern women. They’ve been like that all down through the ages.
— Jeff Trent · Plan 9 from Outer Space

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker calls women modern, then says they have been the same throughout the ages. The joke undercuts its own opening label. What sounds like a complaint about something new turns out to be a claim of permanence, with the contradiction doing the comic work.
Context reviewed