A Levi’s ad popped up in my Hotmail. Something is missing

First pictures, four people, two men and two women. Left to right – Hispanic dude, white chick, black chick, black dude.

Next series, six pictures, five waist and below, sex indeterminable, one full frontal, black dude.

Next series, one closeup of right rear and part of right arm, white chick.

Next series, three people, one black dude, two black chicks.

Next series, three people in shorts, below waist, above ankle, could be three white dudes. No faces, because, you know, white dudes don’t matter.