The answer is: Eight grade
many scenes in famous literature such as Shakespeare contain actions, or themes that considered to be inappropriate if consumed by immature audiences. Eight grade is considered to be in the bare minimum since it's the time that students start undergoing puberty and able to understand mature themes.
Self respect can give off an energy to others that you know your worth and everything the people you communicate with will respect you also if u respect yourself. Some ways to show respect to others is to have empathy for them, be kind to them, and help them when they are in need.