then change it. Nobody is born to be smart and know

what should be done/said and what should not be done/said. If you are not smart enough to know when to be smart, then learn from other smart people. The problem of many so called "smart" people, maybe not you, is that they usually enjoy so much about their "being smart". Actually that is just stupid. One needs to grow up, otherwise will always be stupid. The first thing to do is to realize that "being smart" at wrong time/place is simply stupid.