In Muslim countries, the left hand is regarded as "unclean", so it is forbidden to use it when eating. Never bring water and tea to the guests with your left hand, otherwise it will be considered an insult to the guests.
Islam is a very clean religion, so the left and right hands also perform their duties. Good things are done with the right hand, such as eating, drinking and washing your face. All inferior things are left-handed, such as throwing garbage, scrubbing floors and washing feet. It is worth mentioning that Muslims believe that all demons are left-handed.