We should respect every custom and tradition in any particular nation because there should be reasons behind why they keep and nurture them.
Photos above (taken before 1910 Japan-Korea annexation) show Korean women proudly exposing their breasts out in public. Korea had enjoyed, for centuries, the custom of granting a special privilege of "public breasts exposure" to the women who gave birth to their first baby boy.
It seems that Koreans still remember a bitter experience with Japan who prohibited the long-lived traditional practice in a process of modernizing Korea after Japan-Korea annexation was agreed on in 1910.Japan may have to repentantly admit that she committed the most inconsiderate violation of forcing (?) the Korean women (recently proven to be the most decent in the world in numerous movies, etc. produced by the Republic of Korea. ) to refrain from pursuing their cultural cultivation, for which Japan may have to make reparation in any possible way.
Ex. To help both ROK and DPRK revive their lost traditional practice of exposing breasts out in public by showing the old photos to the Korean population quite oblivious not only to their history but also to the way to appreciate generosity and kindness extended by others.
The photo below (recently discovered) is a front cover of the book titled “Korea” Zwischen Krieg Und Frieden published in 1954, meaning Between War and Freedom, showing a Korean woman still maintaining the traditional custom of breasts exposure believed to have been lost during the 35 years long Japan-Korea annexation from 1910 to 1945.