Rule 34 Dev - 4_fingers abs anthro balls biped cloven_hooves dewclaw_hooves erection fingers foreskin frenulum front_view genitals glans grey_background hoof_hands hooved_fingers hooves horn humanoid_genitalia humanoid_hands humanoid_penis male muscular muscular_anthro muscular_male navel nipples nude penis realistic retracted_foreskin sculpt side_view simple_background solo standing t-pose tail tail_tuft thick_neck three-quarter_view tuft turnaround unguligrade vein tergos bovid bovine cattle mammal 2011 3d_(artwork) digital_media_(artwork) model_sheet zbrush_(artwork)|6464376835