It can be defined as “mutual touching”, which is essentially any form of contact between two people whether it be intentional or unintentional.
[4] While seemingly unavoidable, Hindus have found a way around becoming impure through “mutual touching”—they simply avoid contact.
It is described as “a term that refers specifically to food items that have become very highly permeated with the substance of those who have cooked, handled, and eaten them”.
[6] It is acceptable for close family members to eat the other's leftover food, however, there are some relationships that are one-sided.
For example, a servant can eat an employer's eto food, but the employer cannot eat the servant's eto food.