As a modern male, cannot confirm

Clan of the cave bear vibes

Neanderthals were more peaceful than Homo Sapiens.

So, all those cartoons depicting cavemen dragging a woman by her hair were on to something. Time to write some caveman on modern woman smut!

Did they have bigger dicks or something?

Check out Beforeigners - there is some prehistoric romance atuff there:
https://www.imdb.com/title/tt8332130/
(and the series are generally interesting)

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