When people sit on the ground to eat there is a tendency to throw a few water drops around the plate. This is to keep off ants and other insects away from the food.
I am very happy that you have tried educating the readers about the Superstitions.This will go a long way in understanding our age old Hindu Practices and their Logic.
SOME MORE REASONS OF RITUALS 1. NORTH INDIANS MOSTLY HAVE CHILD MARRIAGE AND GUNGAT BECAUSE MUGALS OF MUSLIM INVADER WERE RAPING YOUNG UNMARRIED GIRLS, HENCE TO AVOID THIS CHILD MARRIAGE CAME INTO EXISTENCE. BY THIS YOUNG UNMARRIED GIRLS USED TO STAY SAFE INSIDE THEIR HOUSES. 2.THE FOOT RING IS WORE TO STIMULATE PREGNENECY POINT AT FOOT. 3. TILAK TO CREATE MORE CONCENTRATION AND MANY MORE... INDIA AND INDIANS ARE ALWAYS GREAT WILL BECOME MORE GREATER UNDER LEDERSHIP OF MODIJI.