Well, LH, it's HOT in the tropics so the people who have lived there forever are probably a lot more comfortable without clothes. As far as covering up the naughty bits... well, they're kinda sensitive, ain't they? You don't want them getting caught in the door hinge or stepped on or anything like that...

Wasn't it someone on this forum who posted about their dad or granddad being a missionary in the Pacific? He arranged for the native ladies to have t-shirts so they wouldn't have to go about bare-breasted, but they cut out holes for their breasts anyway. :-)