People don’t realize but body language tells you a lot about a person. It essentially can reveal various secrets about someone that they might not even realize about themselves.
There’s a whole science to body language that many of us haven’t taken the time to learn about. For example, a pat on the top of the back is friendly and encouraging; something a friend might do, according to study-body-language.com. On the other hand, if someone touches your lower back it means they’re really interested in you romantically, and might even be lusting after you, according to Cosmopolitan.