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2010 abs animal_genitalia animal_penis anthro anthro_on_anthro balls biceps blotch butt canid canine canine_genitalia canine_penis canis claws domestic_dog 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 mammal mixed_sandwich_position monochrome muscular mustelid narrowed_eyes nipples nude oral oral_penetration otter pecs penetration penile penis raised_tail sandwich_position scratches_volume_4 sex simple_background sketch standing tail tail_embrace tail_grab thick_tail threesome tongue tongue_out traditional_media_(artwork)trio whiskers white_background