rule 34 2021 2d abs animated anthro avian balls big muscles big penis black background blush bodily fluids closed eyes clothed clothing cum cumshot darkner deltarune dragonclaw36 ejaculation english text erection front view genital fluids genitals geometric background gif grid background hands free humanoid genitalia humanoid penis legwear loop male mask muscular muscular anthro muscular male narrowed eyes navel necktie nipples open clothing pattern background pecs penis presenting presenting penis short playtime simple background solo spontaneous ejaculation swatchling deltarune text thigh highs throbbing throbbing balls throbbing penis undertale series undressing url video games 5377759