FURVERT!

1:1 anatomically_correct anatomically_correct_genitalia anatomically_correct_penis anatomy animal_genitalia animal_penis aquatic balls canid canine canine_genitalia canine_penis cetacean cetacean_genitalia cetacean_penis chart comparison dahurgthedragon directional_arrow english_text erection genital_slit genitals how-to human humanoid_genitalia humanoid_penis low_res male mammal penis penis_chart simple_background tapering_penis text zero_pictured