Teen films is a film genre targeted at teenagers and young adults in which the plot is based upon the special interests of teenagers, such as coming of age, first love, rebellion, conflict with parents, teen angst or alienation. Often these normally serious subject matters are presented in a glossy, stereotyped or trivialized way. For legal reasons, many teenage characters are portrayed by young adults. Some teen films appeal to young males while others appeal to young females. Films in this genre are often set in high schools, or contain characters that are of high school age. Sexual themes are also common, as are crude forms of humor.