There are two types of people. One, who laugh at others and the other, who get laughed at. The first category can be further classified into two. First, those who are perfect and flawless. You just CANNOT laugh at them because they have nothing which may give you any kind of assistance. The people who consists the other category are the one who actually don't care. They have this special thing in themselves, called self-acceptance. They know they are ugly or dumb or fat or whatever-people-consider-laughing.