Rule 34 Dev - 3_toes animal_genitalia animal_penis anus backsack balls big_butt black_eyes blush board brown_body brown_fur butt chalk chalk_in_mouth chalkboard classroom digitigrade dildo erection feet feral fur genitals incorrect_math information_board inside looking_back male math nude object_in_mouth paws penis plant presenting presenting_hindquarters raised_tail school sex_toy solo tail tapering_penis toes trigonometry trigaroo kangaroo macropod mammal marsupial digital_media_(artwork) shaded|3720753925