For some reason it bothers me greatly when people talk about the number 2 being special because “it’s the only even prime number”. Like of course, that’s literally how they are defined. It’s like saying “did you know 3 is the only prime number divisible by 3?”
My wife (then gf) and I moved in to the current apartment when we were ~25 (we are now almost 30). We made little notes introducing ourselves for all the neighbours, and one couple responded by bringing us a bottle of wine as a gift. We ended up friends with them, playing board games, video games, D&D, and the occasional party. We dont hang out consistently, but its nice to have friends in the building.