in my opinion every ethnic groups has different smells, this is not be taken offensively btw
I am originally italian and i know italians smell like Pizza or tomato paste, thats why i have been told.
Black people smell weird, i can't really describe the smell, maybe a mixture of sweat and BO and fried chicken, i am not sure
Indians smell like Curry, because they eat to much spicy food, even in breakfast i heard
Mexicans also smell, maybe a mix of spicy food and sweat and beans
Asians like Chinese/Japanases smell like Fish or seafood, this is very true i have noticed, every time i go in to my asian friend's house, it smells like fish
White people, especially of northern Europe origin, smell like ham or pork, i am not even kidding about this, i have noticed this many times and i know other non white people say the same thing
Arabs, hmm, i am not sure, haven't met that many, but i am assuming they would also have smell, maybe like dust or sand or Shawarma
^ again not racist, just from my observations about different ethnic groups