I do love a good pull up pic (are there any bad ones?).
Firstly, the fact that she's doing a pull up at all as good as guarantees that she's already fit and strong, and has the body to show for it. Consequently, she's not likely to be wearing much more than a little top and shorts to do her pull up because she's keen to show off that fit and strong body she's built for herself. And last but not least, as the pull up 'works so many upper body muscles at the same time', it gives the female muscle head a veritable feast of muscle to enjoy as she pulls herself up. The wider the grip, the more action on the lats. Narrow the grip, more action on the arms.
What's not to like?
It's all good. And here all week.