We humans are very weird creatures, when you think about it. We are all so different, but also, there are so many things about what we agree on. For example, using a urinal next to another person while there are many others available is very creepy and not normal. Or, for instance, standing on your porch in the middle of the night. You know, I am speaking about things which are legal and there are no rules forbidding them, but it still feels creepy and seeing somebody do it makes you feel uneasy.