I have lived in my house for ten years. My neighbour has never once opened his windows or curtains in that time. Other neighbours in the street who have lived here for 20 years say he hasn’t opened them since they lived here either. He is a middle aged male lives alone, comes and goes to work each day, says hello if he sees me, not enough to make conversation. He keeps to himself, He rarely has any visitors but when he does he speaks to them outside and never invites anyone in. It’s all very strange and weird, anyone else ever known anyone like this? Would you do anything