The author of the book, French illustrator Blexbolex, suggests that the reader thinks about what a biologist has in common with an astronomer, a sick person with someone sleeping, and a chef with a DJ.
With the help of the illustrations, the reader, or perhaps the viewer, begins to notice the similarities between what seem to be completely different people. The reading concerns a book that is almost without words, and the reader has to imagine everything themselves. Participants will discuss obvious similarities and less obvious differences between the people placed in pairs by the illustrator. Afterwards, anyone who wishes to can change from a participant into an author by thinking up and drawing pairs for some of the characters in the book.