I agree with the genetic thing, its a must, but a lot of that can be overcome..my fiance, ironmaiden181, had a complete flat ass!! I started training her, heavy squats, stiff leg dl, and leg presses. And her ass was shaped just like her dads and moms, completely flat!!!! I thought it was going to be hopeless! Well, look at the pics we posted of her, and tell me if it worked!! And for those who missed that thread, www.geocities.com/musclehed275/Ironmaiden181.html