If you ingest alot of a certain spice then it will affect your body odour. Though it is a massive stereotype to say all Indians smell like curry it would be fair to say that all people who eat curry regularly will give off some of its aroma through their pours. According to a recent BBC television programme asian people conversely have the same opinion towards westerners with regards ti dairy products, in particular cheese. In my own experience m, after spending a few months in India and then returning to my house and my wife she was aware of me smelling like curry, it is specifically cumin and cardomon that seem to linger. I was aware of my changing body odour myself. There is alot of truth in this common observation.

indians don't smell like curry, I find that offensive ( I heard a bowl of curry say this once ). Indians actually smell like f*cking dog sh!t ( I hope that I didn't offend any dog sh!t )

I will disagree with food reason. Here, in East Europe we have a lot of gypsies, which originate from India. They smell exactly same, however they even don't know what curry is. Will disagree with hygiene too, as some of indians I knew are really regular people, but they smell too. "Bad smell" is relatively, as bad to whom ?