Rule 34 Dev - abs animal_genitalia animal_penis anthro anthro_on_anthro balls biceps butt canine_genitalia canine_penis claws erection eye_contact fellatio fur genitals group group_nudity group_sex half-closed_eyes hand_on_head hand_on_leg interspecies knot licking looking_at_another looking_back male male/male male_penetrated male_penetrating male_penetrating_male mixed_sandwich_position muscular narrowed_eyes nipples nude oral oral_penetration pecs penetration penile penis raised_tail sandwich_position sex simple_background standing tail tail_embrace tail_grab thick_tail threesome tongue tongue_out trio whiskers white_background blotch canid canine canis domestic_dog mammal mustelid otter 2010 monochrome sketch|1204146055