FURVERT!

alternate_version_at_source anatomy_chart anatomy_reference animal_genitalia animal_penis anthro averysweatyboy balls balls_touching becoming_erect becoming_flaccid beverage_can blue_body chart comparing comparing_penis dominant dominant_anthro duo english_text equid equine equine_genitalia equine_penis erection flaccid foreskin fully_sheathed genitals hi_res human lily_(averysweatyboy)male male/male mammal medial_ring model_sheet penis penis_size_difference sheath simple_background small_penis submissive submissive_human swift_tack_(averysweatyboy)text unretracted_foreskin white_background