Is that true? How do you know that?

It's true!
I've seen more naked women than most Casanovas have, due to the frivolous Swedish sauna-tradition, and also where I grew up, down in the South of Sweden, there was a bath house by the sea, only for women, where you went skinny dipping as a custom.

There are people with fair pubic hair, and even with some red pigmentation, but they are rare.