FURVERT!

animal_genitalia animal_penis anthro balls bdsm bondage border_collie bound brown_collar canid canine canine_genitalia canine_penis canis chair chair_bondage collar collie domestic_dog furniture genitals herding_dog human laboratory light_body light_skin male mammal nude pastoral_dog penis penis_tip restrained restraints sabretoothed_ermine scientific_experiment sheath sheepdog solo species_transformation submissive submissive_male tail transformation