So what if I told you that the person whose hands you just shook actually didn't wash their hands when they were coming out of the toilet?  They don't look so pretty anymore, right?
그런데 제가 이렇게 말한다면 방금 악수한 사람이 사실은 손을 씻지 않았어요. 화장실을 쓰고 나서요.  더 이상 예뻐보이지 않죠?