In the Middle Eastern countries today, body hair removal is still considered proper hygiene, and it is common to remove all unwanted hair, including the pubic region. This practice is centuries old, yet never took over the world by storm; the habit of all-pubic hair removal remained within the Middle East and didn’t get a chance to spread globally.
Yet that began to change when bikinis in Brazil got smaller in the 70s and 80s and the beaches in Rio de Janeiro began to fill up with women in thong-bottom bikinis. As bottoms got smaller, exposed skin area became bigger and women started to wax almost all the pubic region to ensure smooth, clear skin around the bikini with no pubic hair poking out.