What an interesting topic I have been with hispanic asian white and a few blacks and have to say I never noticed any difference in smell. I was set up with a girl who smelled like salami once. That is a whole other story. I know if you eat copious amounts of garlic it will be apparent so I guess if there are foods specific culturally to a race that could be a factor. I would like to do a test and have Peter Lee, Shemar Moore, Ricky Martin, and Chris Hemsworth all shower then let me sniff every inch of them. Purely for scientific reasons mind you.