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5:4 ambiguous_gender anthro balls big_penis bodily_fluids body_writing duo erection faceless_character faceless_male felid feline fellatio genitals graded_penis humanoid_genitalia humanoid_penis male male/ambiguous mammal monochrome nateday open_mouth oral penile penis saliva sex solo_focus text tongue tongue_out vein writing_on_genitals writing_on_penis