Life / Polish traditions and customs? I'm writing a crime novel that takes place in Poland. [10]

Are there any traditional signs of trust, allegiance, loyalty, or other things like that in Poland? Like variations of handshakes, or maybe you hug more? I know with Italians, they are much more sentimental and open about love than Western culture.

I'm writing a crime novel that takes place in Poland, and I would like to use real customs.