Following Donald Trump’s election victory, a South Korean feminist movement called the “4B Movement” is resonating with American women on TikTok. The movement’s principles, which include rejecting dating, marriage, sex and childbirth with men, have sparked conversations about gender dynamics in the U.S. amid concerns about women’s rights. Inspired by years of activism in South Korea, the “4B Movement” — shorthand for the “Four Nos” — advocates for complete independence...