Back in 2013, Swiss filmmaker Iwan Schumacher began collecting photographs of couples who seem oblivious to the camera, either because they’re on familiar terms with the photographer or don’t even realize they’re being observed. Coincidentally, Peter Pfrunder, director of the Swiss Foundation for Photography, had long envisioned putting together an exhibition of photographs of couples. So it was only natural for the two of them to team up to produce a book.