Confused by American Apparel

My loyal and brilliant readers will certainly help me out here. Why on fucking Earth do we need a female body to model male underwear?

Or is it the new trend I missed in female undies?

In general, I see a lot of confusion going on in this ad. If it is aimed at females (who statistically buy the majority of male underwear--for the men in their lives), then a nice male model for the male knickers would have been appreciated.

If it's aimed at males however, I am not sure what the hell it is trying to say to them.