Rule 34 Dev - anthro backsack balls biped butt erection foreskin fur genitals gradient_background grey_background grey_body grey_fur grey_hair hair hair_over_eyes horn humanoid_genitalia humanoid_penis male nude open_mouth partially_retracted_foreskin penis short_hair simple_background solo standing tail tail_tuft tuft white_background young young_anthro young_male zeriara bovid bovine cattle mammal|51153060