How we greet each other.
What’s considered common courtesy.
What’s considered impolite.
How we show respect and disrespect.
What is embarrassing.
What we find humorous.
What is rude humour.
Seating placement in a room.
How closely we stand next to each other.
How we touch each other.
What we eat and how we eat.
The holidays we celebrate.
What we wear.
The division between home and work.