This is because India has about 29 states, each with a different language, customs etc.
Dating as we Westerners think of it, involves trial and error.
This serioussly isn't meant to be racist or offensive. Is it true that most Native Americans will not date or marry outside of their race? The Native American culture, worldview, and laws are radically different from mainstream society.
The reasons are: The difference between Native Americans and mainstream society is more then skin deep.
Native American society is segregated firstly by family, secondly by community, thirdly by Nation and then by Race.