Insanity is a Pleasure

In this society, twice a year they have this thing they do called the slimming out ceremony. This slimming out ceremony is to help the city slim out, like in the name. Though the cities that do this ceremony are the biggest so why do they do this? They only take out ten people for the whole year. Five for every half year. Why are the people that control the city really doing this? On the day of the slimming out ceremony they kill five people. Everybody huddles around their TV waiting for their name not to be chosen. They think these big cities they won't get chosen, but that's not true. Beware of the slimming ceremony because when you get chosen, Insanity. Is. A. Pleasure.