I'm an American, married to a Bulgarian, and have noticed the EXACT same thing, both with our Bulgarian friends here in the states, as well as those back in BG. I used to get a little self-conscious when I'm a room full of beautiful, thin, Bulgarian women, but then I realized that it must just be a Balkan thing. I have no other explanation! Even my 50 year old mother-in-law looks like shes 30, at the most! Lucky Balkan genes, I guess! - Amy