In school, you always had the class clown. The kid who would speak and do the most random things to get attention from classmates. Teachers would often single out these students when it comes to asking questions. You may wonder where these people go as they grow up and go into the adult life.
Most of these individuals will mature, but may maintain their clownish personality. As adults, this type of behavior gets old quickly, and they may seem obnoxious, and even offensive at times. There is always that one obnoxious and insensitive person who may make inappropriate jokes that may involve stereotypes and the like.