When did white girls get big butts?

"OK, I want to know just when did white girls in general start developing big butts?" That's what a friend of mine asked me some time ago. I had never really noticed until this question was posed to me. I know that the government tells us that the American public in general is getting heavier, but what is the deal with the butts? and the obsession over them by some?

Author's disclaimer: The Author is typically male and has no preference in butts. He is a fan of all.

I know... maybe this post should be under "What the #### is up with that?". But have you ever heard women talk about their lack of butt? I work in a mostly female environment (at least 75+ a day) and I have heard them talk about their lack of butt for some time now. After actually paying attention to this, I believe that this trend of bigger butts is somehow coveted by women in general and mostly by white women.