That makes it sound like it's intentional. I always thought it's just that there are things that you, personally, find weird and there are things you don't, an

That makes it sound like it's intentional. I always thought it's just that there are things that you, personally, find weird and there are things you don't, and that it's heavily based on your upbringing, and because your neighbor will have a similar upbringing, both of you find the same things weird. When you hang with your neighbor, you will naturally shit on weird things, as we all like to do. A group of people automatically make up a society and so your society finds the exact same things weird and shits on the same things. And at no point in the process did you have any individuality or real thought in the matter -- usually at least. Society created your identity and you simply promote it. Over time, opinions change because things happen to society collectively, but it's a slow process.