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anthro autotailjob ball_tuft balls beard biped black_border border brown_balls brown_rat clothed clothing erection facial_hair feet genitals gtskunkrat hairy humanoid_genitalia humanoid_penis long_tail looking_at_viewer lying male mammal master_splinter masturbation mature_anthro mature_male murid murine nipples on_back paws penile penile_masturbation penis prehensile_tail rat rodent solo spread_legs spreading tail tail_around_penis tail_fetish tail_masturbation tail_play teenage_mutant_ninja_turtles teenage_mutant_ninja_turtles_(2012)tuft vein veiny_penis