The Government of the Republic of Korea does not recognize dual citizenship. Men must choose a single nationality by March 31 of the year they turn 18 years old, and women by the age of 21. If men do not select a nationality by that date, the Korean government will consider them to have chosen Korean nationality, and they will be obligated to serve duty in the Korean military. Conversely, women who do not choose a nationality by age 21 will be considered to have lost their Korean nationality.
Um....I get why the men don't lose their citizenship, given the mandatory military enlistement. Gotta get the soldier body count high. But for women? I don't get it. Explaination, plz.