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2013 animal_genitalia anthro balls beard big_balls biped black_body black_fur brown_body brown_fur brown_rat claws digitigrade erection facial_hair fur genitals glacierk goatee hair half-erect humanoid_genitalia humanoid_penis looking_at_viewer lying male mammal master_splinter murid murine nude on_back penis pink_nose pink_penis pose presenting presenting_penis rat red_eyes rodent sheath solo teenage_mutant_ninja_turtles teenage_mutant_ninja_turtles_(2012)toe_claws white_hair