the left one is MUCH better.... better body with great tits.... the right one has only AWESOME TITS, but everything else is meh.
She is highlighting her best bodypart, and picks a shirt that destracts from her waist---in short, she hooks you with the tatas, and hopes you don't notice the waist---until after you sleep with her.
How does this relate to the arm don thread? Well, some of us lift and hope one notices are arms or body instead of our face (cough, cough, Rodney St. Cloud)