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anthro areola blush bottomwear breasts circlet clothed clothing clothing_lift duo echidna erection female female_focus genitals glans hand_on_penis humanoid_genitalia humanoid_penis imminent_sex looking_down male male/female mammal monotreme mostly_offscreen_character navel nipples one_breast_out orange_areola orange_nipples penis penis_grab pink_glans pink_penis presenting presenting_vulva raised_bottomwear raised_clothing raised_skirt sega simple_background skirt solo_focus sonic_adventure sonic_the_hedgehog_(series)tail tail_under_skirt tenshigarden tikal_the_echidna vein veiny_penis vulva