Whole state and its affair is paradoxical. Hence never bother what these idiots tell.
Do do not waste your time about learing anything about their culture. I assure you that you have nothing to learn from them, rather you will waste your time.
9. Rule -9: -----------
Want to talk to someone. Use "ama" (means "yes") frequently.
Yes, it is the thumb rule and see the development. Your work will be done relatively faster. But do not give an impression that you know the language. Just give an impression that you people are most unbelievable race on the planet (never mind they are a collection of rowdies, they know it.)
10. Rule - 10: --------------
While taking a house, make everything clear.
Yes, make everything clear to the owner, the water, the electricity amount to be paid, your timings, your food...everythingfrom A to Z.
When you see a house, the owner will be the most descent creature on earth. Later on first casualty will be your early morning chores. Madras is city without water and in summer seasons very few take a descent bath. If you are non vegetarian make it clear to them. House shifting is pain.