Indian society is very close-knit, and personal space and privacy are foreign concepts to most people. However, Indians are warm hearted and curious people. The down side of this though is that they tend to stare and ask lots of questions, many of them personal in nature. It can be confronting if you do not expect it, but do not be afraid to ask the same questions in return. You will not cause offense. In fact, people will be happy that you have taken an interest in them.