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2_penises absurd_res anthro anus aquatic armpit_hair balls body_hair butt diphallism erection feet fish foot_focus genitals glans grey_body hi_res horizontal_diphallism humanoid_feet humanoid_genitalia humanoid_penis lying male markshark mr_ultra multi_genitalia multi_penis muscular muscular_anthro muscular_male nude on_back penis plantigrade presenting red_eyes shark smile smiling_at_viewer soles solo spread_anus spreading teeth toes