rule 34 2boys alien animal genitalia anthro armor ass black body blue body comparing comparing penis digital drawing artwork digital media artwork duo elemental creature erection fingers ftl ftl faster than light gay genital slit genitals hi res internal balls knot koki 1 male malemale male only mineral fauna monster monster legends musclegut muscular muscular anthro muscular male nude octex monster legends penis penis size difference presenting pseudo hair rock rock creature rockman species rockmen signature slightly chubby slit tagme tentacle tentacle hair unusual anatomy unusual genitalia unusual penis video games warehouse xarian monsvik yaoi 7324652