Why do white guys like skinny girls?

i know if youre white youre probably thinking "why would they/we like fat ones?" but by skinny i mean super skinny, rail thin women who dont look very womanly at all. for instance, all those victoria secret supermodels, jessica alba(who I heard has had an eating disorder before), paris hilton and the latest it girl megan fox. some of them may be very pretty but ive always noticed that probably most white dudes have a taste for tall, shapeless females with no real curves or nice junk in the trunk...Beyonce, Halle, Kim K, and the ever famous J.Lo. These women are ideal to me.*