when they give you something they have a different way of giving it to you, since they have many tricks to give it to you, since you never know when they will stop.
The left hand for them is the hand that should be used for the most intimate personal hygiene, so it should not be used for greeting, eating or for any other social use. For them it is considered an "impure" hand.
Personal space is much smaller than in other cultures. In the social sphere, in large crowds of people, in queues and elsewhere, it is common for personal space to be minimized and does not even exist.