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2010s 2018 2boys 2males animated_skeleton bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_eyes blue_tongue blush bottom_sans dark_background duo fire_elemental from_front_position gay grillby grillby_(undertale) grillsans heart-shaped_pupils heart_eyes indoors larger_male larger_penetrating larger_penetrating_smaller legs_over_partner's_shoulders legs_over_shoulders legs_up male male/male male_only male_penetrating mellednsfw missionary_position muscular muscular_male nude nude_male orange_body penetration sans sans_(undertale) seme_grillby sex skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom sweat tongue tongue_out top_grillby uke_sans undead undertale undertale_(series) yaoi

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