20133:4analanal_penetrationanimal_genitaliaanimal_penisanthroanusbacksackballsbrother_(lore)brother_penetrating_brotherbrothers_(lore)buttcanidcaninecanine_genitaliacanine_peniscaniscomicdialoguedigital_media_(artwork)directional_arrowdoberbrothers_comicdobermanndomestic_dogduoenglish_texterectionfrom_behind_positiongenitalsheart_symbolhi_reshot_doggingincest_(lore)knotlizardlarsmalemale/malemale_penetratedmale_penetratingmale_penetrating_malemammalmultiple_scenesnudepenetrationpenisperineumpinschersexsibling_(lore)simple_backgroundtailtail_motiontailwagtexttop_hole