I Lost One Follower — Here Is What I Learnt

Having set the challenge to increase my followers by 1000. I have become obsessed with checking my stats. Today I noticed that in two hours I had lost one follower. Just one follower, but to me this one follower became the most important person to my blog. Before you all worry about the level of my sanity I went from 941 to 940 it was very noticeable. If only I could ask that 1 follower why they had unfollowed? What post made them unfollow?