While American lingerie manufacturers have focused on faux chestiness (push-up bras and other tools of sexual perjury), Euro manufacturers have apparently focused on studying motion. Specifically, maximizing the bounciness with each step taken. This is, quite frankly, fabulous.
Why the distinction, when American (white) men so adore cleavage? My only thought is that Euro women are less beaten down by society's demands of thinness (possibly because they are, in fact, thinner). American women tend to associate any bounce with a) fatness and b) sluttiness. Males, regardless of nationality? They associate it with HELL YES.