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4_toes animal_genitalia animal_penis anthro auto_musk_sniffing balls bodily_fluids canid canine canine_genitalia canine_penis canis claws detached_sheath domestic_dog eyewear feet feral_transformation finger_in_sheath fingering fingering_self fur genital_fluids genitals glasses hi_res human human_to_feral hunched_over knot knot_in_sheath looking_pleasured loss_of_dexterity male mammal masturbation mid_transformation multicolored_body multicolored_fur musk nipples nude open_mouth penis penis_tip precum sheath sheath_fingering sheath_play sheath_tuft simple_background sitting skuru_(character)sniffing_self solo species_transformation toes tongue tongue_out transformation visible_sniffing white_sheath zestycuke