The guy with the back to the camera

A couple with their backs on their backs

Two women behind their backs

Children on their backs

Students with their hands on their backs

A man and a woman sitting behind their backs

Students with trophies on their backs

Two kids on their backs

Children with backsliding on their backs

White collars who work behind their backs

A couple holding hands on their backs

A couple who listen to music on their backs

Men and women behind their backs

Supermarket sales

Fashion stripes and cartoons