Two women sitting back to back

Couple working out together

Grandfather and grandson

Two men standing in half painted room

Men standing back to back

Couple sitting on the ground with building blocks, cropped view

Couple sitting back to back, using laptop computers, holding hands

Couple sitting back to back on the ground, holding laptop computers, smiling up at camera

Two professionals sitting back to back, eyes closed, woman holding cell phone

Two professionals sitting back to back on ottoman, woman's eyes closed

Yakushima Macaques, Yakushima, Kyushu, Japan

Man and woman in bar

Two garden gnomes standing back-to-back

Two friends

Couple looking at each other next to bookshelves

Smiling couple sitting back to back

Smiling couple sitting back to back

Smiling couple sitting back to back

Senior woman with grandson, sitting back to back, not looking at each other

Young woman holding cell phone with back turned on boy playing handheld video game

Couple sitting back to back with laptops on their laps, holding hands, smiling at each other

Man and woman in bar

Two White Storks (Ciconia ciconia) standing back-to-back looking in opposite directions

Male and female professionals standing apart, back to back, arrows between them

Couple standing back to back in nursery, looking over shoulders at camera, woman's arms folded

Couple sitting back to back in front of an outline of a house painted on wall

Two businesswomen standing back-to-back talking on mobile phones

Toy robots standing back to back, side view

Brother and sister sitting back to back, looking up and away

Brother and sister back to back, listening to earphones, smiling at camera

Grandmother and grandson sitting back to back, arms folded, boy looking at camera

Grandmother and grandson sitting back to back, woman looking away, boy looking at camera

Two soap dispensers

Young man and woman standing back to back, smiling at camera, portrait

Teenage twin sisters standing back to back with heads touching, supporting fitness ball between them

Father and son sitting back to back on floor, gerbera daisy growing between them, both looking up at

Two young friends back to back, smiling at camera, side view

Couple standing back to back in nursery, woman crossing arms, cropped view

Two teenage girls sitting back to back on black and white divided floor, viewed from directly above

Couple back to back, both looking over shoulders at camera

Teenage twin sisters standing back to back, supporting fitness ball between them, high angle view

Baobab trees growing in forest

Teenage sisters sitting back to back on the ground, viewed from directly above

Boy and man sitting back to back, looking over shoulders at a single flower between them

Twin sisters standing back to back, arm in arm, viewed from directly above

Couple back to back, both looking away, side view

Two men sitting back to back at the beach, wheat grass between them, side view

Two men sitting back to back on beach with grass between them, both with heads down