portuguese colonists were bothered by brazilian natives bathing 5-7 times a day, that was their first push to learn native languages only to teach them that bathing reduces your sex drive.

according to the map apparently they got better, i believe it is a cultural vestigial traits from when that territory was under arab rule or smth, and muslims are the most hygienic people in the planet, so it eventually prevailed in modern era with recent scientific discoveries.