An integral element of Thai culture is the Wai gesture.

An excerpt from the article 31 facts about Thailand

Thais do not greet each other by shaking hands, they greet each other by bowing "Wai" with their hands folded as if in prayer. In this way, they express their respect for other people, as well as for places and objects of worship.

Buddha statues are treated with special devotion and cannot be touched, they must be shown respect.