Cheek to Cheek Chicks

How come every time a group of chicks are together and a photograph is taken of them, they always lean way into the camera and get cheek to cheek? Is this some sort of learned behavior that comes from attending 300 Tri Delt mixers where scoring "we're having so much fun" party pictures are the main goal of the event? Or do chicks just suddenly develop serious back issues when a camera is placed in front of them?

I need answers.