Xbooru - 1boy 2020 2d 2d (artwork) anal anal fingering anal masturbation anthro anthro only artist signature ass black background black body black fur caprine darkner deltarune digital media (artwork) erection fingering fingering self fur furry genitals glasses goat green eyes horns humanoid genitalia humanoid penis kneeling male male masturbation male moaning male only mammal moaning multiple views nekazzy nude nude anthro nude male onomatopoeia penis pink horns precum ralsei ralsei with black fur signature simple background text third-party source undertale (series) video game character video games