FOLLOW...UNFOLLOW

Okay...this is just a simple question...why do people follow you, then when you follow them they unfollow you?? I don't have 1,000,000 followers so I know when my numbers change. Then what really kills me is when you unfollow them, they request to follow you again. Like #cmonson make up your mind...and then don't get mad when I call you out about it either. I just felt the need to express myself because I just don't get it.