This man doesn't know if someone is tall or short, skinny or fat. He can't pass judgement on anyone based on what they wear, how their hair looks or what race they are. His only option to determine if he likes someone or not is to judge them by how they treat him.
As you'll see, the real estate area of comfort changes depending on how well you know someone. What's appropriate with a close friend is definitely not going to be OK with a stranger or even an acquaintance.
We all lie. There are millions of reasons why, but everyone of us do it. If you say you don't, well, you're lying. But, are there any surefire signs for us to know if we're being lied to? There sure are, and that's the truth.