Would do the middle one. Not fat, not skinny, has hips and boobs.
The one on the left looks really bony. She has no soft, rounded features like the other two.
The one on the right is fat. And looks photoshopped. Her face has practically no fat in comparison to her body, it doesn't look right.
The one on the right. You know man like needs something to hold on to. She's the most curvy, decent breast and back off. The one in the middle has the best face though, but all in all, the one on the right would get it.
I'd do the middle one, she's got the best figure and looks the most attractive.
I wouldn't do the left one though, she's too skinny and she just doesnt look as attractive as the other two.