Making America Great Again may not work out so great for some American men in the bedroom. A number of feminists are going on a sex strike in retaliation for Donald Trump’s presidential victory. According to videos and social-media posts compiled and cited by the Daily Telegraph, liberal women are drawing inspiration from the South Korean “4B” movement, which commits women to four “no” behaviors toward men — dating, sex, marriage and children. (The Korean prefix for negative words is “bi.”)...