y do we have homework cause thats why we go to school i mean like we go home to relax and be free but when we go home we have to go and do are

y do we have homework cause thats why we go to school i mean like we go home to relax and be free but when we go home we have to go and do are homework wich actually could make people fat cause they have to go upstairs and do there homework when they could be outside exerciing and keeping fit x