rule 34 2023 5 fingers abs age difference aggressive retsuko anal anal sex anthro anthro on anthro areola big dom small sub big penis biped bodily fluids bottomless bottomless anthro bottomless male brother brother penetrating brother brothers brown body brown fur clothed clothing dialogue digital drawing artwork digital media artwork dominant duo embrace english text erect nipples erection facial hair fangs fingers foreskin fur fur tuft genital fluids genitals grey body grey eyes grey fur grey hair haida hair half closed eyes half erect hand on chest hand on leg hand on thigh holding partner hug hugging from behind humanoid genitalia hyena jiro aggretsuko jiro haida aggretsuko koko2unite large pecs larger male looking at another looking down male malemale mammal muscular muscular male narrowed eyes nipples nude onomatopoeia partially retracted foreskin pecs penetration penis penis between thighs pourwatter sanrio sibling simple background size difference smaller male smile smooth fur sound effects spots spotted body spotted fur spotted hyena standing sweat teeth text tuft vein veiny penis white background window yaoi 7487495