This article investigates impure motivations in social preferences through an experiment in which participants choose menus of social allocations (i.e. allocations of gains between themselves and another participant). Menu choices reveal the presence of impure motiva- tions: according to a parsimonious theoretical model, negative motivations (e.g. guilt) will imply a preference for smaller menus, whereas positive ones (e.g. pride) a preference for larger sets. By varying the level of publicity of within-menu choice, we can also observe the importance of self- and social image. Data from France and Japan show unambiguously an important impact of impure motivations on preferences on menus, with the suggestion that negative ones exceed positive ones.