Xbooru - 2020s 2022 2boys 2d 2d (artwork) anal animated skeleton bigger male bigger penetrating bigger penetrating smaller blue blush blue tongue blush bottom on top bottom sans bottomless bottomless male brother brother/brother brother and brother brother penetrating brother brothers clothed digital media (artwork) duo ectopenis ectotongue fontcest from front position goma dango 555 green socks incest kneeling larger male larger penetrating larger penetrating smaller making out male male only male penetrating monster orange blush orange socks orange tongue papyrus papyrus (undertale) papysans partially clothed penetration penetration from front penis pixiv id 49095896 power bottom saliva saliva trail sans sans (undertale) seme papyrus sex sex from front simple background skeleton smaller penetrated socks socks on solid color background sweat tongue tongue out toony top papyrus topwear uke sans undead undertale undertale (series) video game character video games visible breath yaoi