He rejection of the null hypothesis that the observed associations of wild male guppies in mixed-sex shoals, based on either their body length or coloration, was generated by chance [3, 67].PLOS ONE | DOI:10.1371/journal.pone.0151243 March 17,10 /Male Sexiness and Social Associations in the GuppyModeling Male-Male Associations in Mixed-Sex GroupsTo ascertain whether preferential social association