Why should we respect someone just because their older shouldn't they earn your respect by respecting you?

Think about the question that you are asking ... respect comes from both sides , however being the younger one out of parents, grand-parents, aunt's, uncle, ect. you must show respect because you would want them to respect you ... its just like first time college experience, you respect your room mate because you would want that same treatment back. some times you have to show someone that its a better way to treat people...by showing common courtesy respect , you give off a better opportunity of getting respect well deserved ....