Indian culture ～how to use hands～

http://www.indax.com/trculture.html
A very important, yet subtle, factor in India is avoiding the use of your left hand when interacting with others. In India, you use your left hand to clean yourself after using the toilet so it has extremely negative associations. Using your right hand only is one of the easiest things for Westerners to forget to do, but it makes a difference. A friend who has been coming to India for more than a decade, but only recently made it a point to only use his right hand, said he really noticed how much people appreciated him making an attempt. It may mean a bit of extra effort at first, but it will be appreciated, and will soon become automatic. Even if you are left handed, try and adjust as much as possible.