Customary Cambodian teachings are laid out in verse form in long works from the 14th to 18th centuries collectively called Chhbap ("rules" or "codes"). These were traditionally learned by rote. Works such as the Chhbap Pros ("Boy's Code"), Chhbap Srey ("Girl's Code") and Chhbap Peak Chas ("Code of Ancient Words") gave such advice as: a person that does not wake up before sunrise is lazy; a child must tell parents or elders where they go and what time they will return home; always close doors gently, otherwise a bad temper will be assumed; sit in a chair with the legs straight down and not crossed (crossing the legs is a mark of an impolite person); and always let the other person do more talking.
In Cambodia it is not polite to make eye contact with someone who is older or someone who is considered a superior.