First of all I dont remember her saying she only dates black guys, and i swore she went out with one of her dancers who was hispanic. And that hole black guy thing is stupid. There are some black guys that will go for anything white, yes, but you dont really see that alot, (unless they all harbor where you live). And who knows, those girls may be kool. I mean you dont see big black girls complaining about their wheight and becoming skinny as F***. Its not really a cultural thing, but big black gurls can be the coolest people. So i think that comment was kinda dumb.
On the x-tina bit, maybe its a side effect of the birthcontrol. I understand she is kinda a tiger when it comes to sex, (taking from her interview in stuff or maxim).
There are quite a few big women that become thin and the boobies stay

(please god)
