Interesting and that agrees very closely with what a friend of mine, who is retired from Army Intelligence and spent a lot of time in Latin America, told me.
We were discussing a pretty girl who worked as a secretary for the Army who made a lot of trips to El Salvadore for some reason. He told me an American girl who has light colored hair would be considered extremely valuable for intelligence work because she would be so desireable.
BTW, this guy was second generation Italian and had black hair.
Bump for later.