The neighbours

The neighbours on my left side are a couple who argue a lot, or more like she screams at him for a really long time, probably because he is a very bad listener, or more likely, he is not willing to change. The first and only time I met them he smiled so much to me I wondered what he was up to. Anyway. The doorbell rang yesterday. I didn't expect anybody that early and I checked my mobile and nobody had contacted me, so I didn't open. Then it rang again after a short while. I decided to take a peak out of my open bedroom window in case someone was planning to jump in and rob me, expecting I wasn't home. There he was right in front of my window, if possible, smiling even more, standing in a bathrobe and asks me: Have you rung on my bell? No! Are you sure?