Rule 34 Dev - 2boys 2d animated_skeleton blowjob blush cigarette drool drooling hands_on_penis heki_(artist) humanoid incest male male_only papyrus papyrus_au sans sans_au scar scar_on_face smoking smoking_cigarette swapfell_papyrus swapfell_sans swapfellcest undertale undertale_(series) undertale_au undertale_fanfiction yaoi|6802544352