I have Always wondered Why do People (mainly teens) add mutual or random people on facebook? My sister is a good example of this, she is 15 and she has 2045 friends on facebook. my sisters personality is like one of those popular girls from the movie mean girls. why has she got that many friends, i don't see how she can have so many! I am 17, I only have 12 friends on it because I only add close friends and family on it. I don't add random people on facebook because I like to keep myself to myself and I don't particularly want people on my news feed that I don't care about