FURVERT!

animal_genitalia animal_penis avian balls bdsm beak black_and_white bondage bound canine_genitalia canine_penis collar cuff_(restraint)cuffs_to_collar erection feathered_wings feathers feral genitals gryphon harness knot leash line_art male monochrome mythological_avian mythological_creature mythology penis quadruped restraints shackles sketch solo spreader_bar submissive submissive_male tail tail_tuft testicle_cuff tuft ultraviolet wings