Who else reads books about submarines?

Post date: 2021-01-14 08:59:13

I'm trying to understand a joke from a popular TV commercial that's currently being shown in the US.

Progressive Insurance has a series of silly TV ads that feature a consultant who advises young-ish people on how to stop acting like their parents. The jokes hinge on various stereotypes concerning older people (they don't know how to silence their smartphones, they are upset by hipsters who dye their hair blue, etc.).

One of these ads shows a young-ish person reading a book about submarines. The consultant asks him, "Who else reads books about submarines?". The man sheepishly answers, "My dad".

I'm puzzled by this joke. Is this really a cliché with regard to elderly men? If so, I hadn't heard it before.

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