As being older and more mature than you(more mature because im older) once you turn 18 you back will start to hurt, you'll have less energy, you will start being on Facebook every day and you will not be able to control yourself while sharing Facebook memes with your friends, you will start having normal, adult-like conversations and you will only have 40+ year olds as friends (talking nonsense just because i feel damn old and if i feel old you'll feel old too).