alternate_universe blue_ectobody blush bone colored digital_drawing_(artwork) digital_media_(artwork) duo ectopenis feathers feet glowing horn humanoid hypnos_the_skeleton_(oc) male male/male male_penetrated male_penetrating male_penetrating_male not_furry obsidiancryptid penetration purple_ectobody razor_fresh!dust_(oc) ribs sans_(undertale) sex skeleton undertale_(series) wings
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