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anthro anus aquatic aquatic_gastropod balls big_butt blue_body blush blush_lines bodily_fluids butt canid canine canis clothing domestic_dog erection floppy_ears gastropod genital_raphe genitals glans hat hat_only headgear headgear_only headwear headwear_only humanoid_genitalia humanoid_penis looking_at_viewer male mammal mollusk mostly_nude nudibranch nue_(bukkbuggy)open_mouth open_smile penis presenting presenting_anus presenting_balls presenting_penis raphe_(anatomy)scrotal_raphe sea_slug simple_background slug smile solo sunspikevee thick_thighs wide_hips yellow_eyes yellow_glans