In Khmer culture regarded as head. Touch the head or feet, facing towards the head, thus not polite. The salutation is used "Sam was all ya" which is similar to the Thai Wai. The eyes with the elderly considered rude
In Khmer culture is considered the head of the high. Exposure to the head or head turned so disrespectful. Hail to use "Samsung's Spring" similar respect of Thailand. Making eye contact with the elderly is considered impolite.
In Khmer culture is considered the head to be high. Touch the head or foot turns toward the head so impolite. Greetings. "Sam spring roll." that คล้ายการไหว้ Thai. Making eye contact with the elderly is considered impolite.