Rule 34 Dev - 2012 anthro balls blush brothers brown_fur brown_hair caress closed_eyes duo entwined_tails erection eyewear facial_hair from_behind fur glasses goatee hair hand_holding hand_on_face hand_on_stomach humanoid_penis incest kissing male mammal mouse navel nipples nude penis pubes rodent sex shower sibling slightly_chubby standing tan_fur twins wanikami watermark wet yaoi|2133376448