I was in the Pacific Islands in the 70's. Took a plane to one (Truk now Chuuk) then later a "field trip ship" to some outer Islands. Women simply didn't wear tops at all there. Just a length of cloth for a skirt they called a lava-lava (the top of the cloth is rolled over, very like a towel after a shower but all the way around). It very quickly became no big deal at all. Men also were mostly naked. Some - mostly younger - also wore the lava-lava, and other a ... I forget their word - I want to say a Thu, pronounced "two" but maybe that meant something else? It was basically just wrapped around the crotch and waist like a diaper. 

The one thing I did NOT get used to was the old folks who used to have ear plugs - disks inserted into the ear lobe and expanding it like young people do today. They had removed the plug but there was a long flap of wrinkly skin that just hung down. To this day I can't look at an ear plug on hip young people without thinking of that wrinkly flap of skin haha.