I don't know how many of them are out there, but I want this to be public. There are people who's minds are not that of a humans. These people are not social upon first encounter, but they get more talkative the more you hang out with them. These people treat rules like laws, depending on who sets them. A good way to test this is to ask them to promise to answer truthfully, only then will they obey the rules. They do not understand much social norms, they have hard times picking up on social ques. The more comfortable they get, the more "relatable" they become, you may not notice it, but some people start to mirror their friends jokes. Things like the way they walk, talk, everything. These things will copy you until they feel like you, this way you feel close to them now that the 2 of you are alike. It is unknown what these things are, or where they come from. Please be careful, what goes on in their head is never certain. Ask them to promise to answer truthfully, and ask them.