The author is right.
"“For most of my life I had massive reservations about getting naked,” confessed Seagle. “But the more I traveled the world, and found myself in uncomfortable situations, the more it became obvious that the American anxiety of ‘I’m not taking my clothes off in front of anyone else unless it’s to have sex with them’ is unique—and not in a good way—to the US."
But to be frank, it's really not just the US.
A lot of countries in the West and the middle East.
Much less in Africa or South America.
Could not find it online though.
Is it any good ?
Have you read it yet ?