Prime Minister Shinzo Abe grumbled Wednesday about his ruling party's second-highest lawmaker's controversial remarks calling people who opt not to have children "selfish.""It should be up to each person to decide whether to have children or marry," Abe said during a debate of party leaders in the Diet.Toshihiro Nikai, secretary general of the Liberal Democratic Party, said Tuesday in a speech, "These days some people have a selfish idea that it is better not to give birth to children."The 79-year-old Nikai's remarks were the latest in a series of gaffes by Japanese politicians demanding th…READ FULL ARTICLE