Xbooru - 1:1 1:1 aspect ratio 2015 2boys 2d 2d (artwork) alternate version available animated skeleton blue blush blue penis blush bodily fluids bottom sans bound bound arms clothed clothing digital media (artwork) drooling duo ectopenis flowans flower flowey the flower flowsans fluids genitals goopynoms grey background interspecies jacket male male/male male only monochrome monster off shoulder pants down pants pulled down penis plant sans sans (undertale) seme flowey sex simple background skeleton tentacle tentacle around penis tentacles on male top flowey uke sans undead undertale undertale (series) video game character video games vinejob vines vines tentacles yaoi