因为他是男的，在父系找点存在感。毕竟追溯母系祖先就没男人什么事儿了，线粒体传女不传男。事实上就算追溯父系也没啥用，男人的亲自不确定性太大了，传不了几代就不知道丢到谁家去了
Because he's a man, and he's a father. After all, the matrilineal ancestors have nothing to do with men, the mitochondrial women have nothing to do with men. In fact, the men's personal uncertainty is too great to know who they left behind for generations.