Their skin. It’s usually dry. They are pale too. Their tooth will grow if they approach you. They act strange and they seem somehow bothered with your presence. Take the pocket’s Bible with you. They will feel the Bible’s smell.
They don’t hug, and they don’t like humans smell. Don’t approach too much, they are little cold. In Europe no one kiss or hug. If they act very polite, like a Duque or seems to be very traditional in their dresses or act like they are very rich or have a English accent, pay attention. Listen the names, generally they identify theirselves for the names. They are very curious about you. They also hunt in the internet. They are good listeners too.