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accessory anthro balls brown_rat cloak clothing digital_media_(artwork)disney erection foreskin genitals humanoid_genitalia humanoid_penis lavilovi looking_at_viewer male mammal mature_anthro mature_male murid murine nipples penis professor_padraic_ratigan rat rodent simple_background smile smiling_at_viewer smirk smirking_at_viewer solo tail the_great_mouse_detective