The suspicion is confirmed, my neighbors are weird: as I had just pulled the door, going out, right at the moment the horror dawned on me that I had locked myself out because I’d worn dirty jeans yesterday and my keys weren’t in the pocket they were supposed to, I heard a voice (a female, thirty-ish voice, not a little girl’s) from behind the next door’s spyhole:

…it’s the next-door neighbor… I don’t know him…

I would have answered, through the door, “well, how about introducing ourselves now!” but for some odd reason I wasn’t quiet in the mood right then. Go figure.