Do white guys mostly like white girls?

I know some really gorgeous girls, all dark haired and eyes...exotic looking. One is lebanese, the other Spanish, one Mexican and one French, but has dark eyes tan skin and dark hair like the others. All those girls have gorgeous full lips, itty bitty waists, curvy s, big busts, and yeah when they go out I watch the white guys walk past them. I noticed they go nuts for more ordinary looking white girls, particularly blondes, but no curves, etc. In fact most of the girls the guys were going for would look exactly the same as the guys, if they were taller with short hair. Why is this?