I didn't mean passing chopstick to chopstick (I doubt I have that much skill to pull it off without dropping something ). I mean like giving something from your plate to another person (i.e mum passing something to children and vice versa. It's kinda normal with my family. Like my mum doesn't like raw fish so she gives it to me and I don't like spring onions so I give it to her by putting it on her plate and stuff )
It's more like something "part of your personal space" is not to be err.. for lack of better words, 'invaded' by others. Hence hugging and such is like err 'encroaching on your personal space'?