Rule 34 Dev - 2019 animal_genitalia animal_penis anthro ass athletic athletic_anthro athletic_male autofellatio backsack balls big_balls big_penis black_penis blue_eyes canid canine canine_penis canis claws erection feet finger_claws fur genitals grey_body grey_fur hi_res knot kousen legs_up lying male mammal masturbation nipples on_back open_mouth oral oral_masturbation pawpads pecs penile penile_masturbation penis perineum scar solo tattoo toe_claws tongue tongue_out upside-down vein veiny_penis wolf|5055160896