rule 34 2023 anal anal sex anthro anthro on anthro anthro penetrated anthro penetrating anthro penetrating anthro areola ass balls bed biceps biped bovid bovine brown body brown fur cattle digital media artwork duo elfein evan sheng eye scar eyebrows facial scar father father and father and son father penetrating son flaccid foreskin from behind position fur furniture genitals glans horn humanoid genitalia humanoid penis inside intraspecies jesse sheng male malemale male penetrated male penetrating male penetrating male mammal muscular muscular anthro muscular male nipples on bed open mouth parent parent and partially retracted foreskin pecs penetration penile penile penetration penis penis in ass pillow scar sex smile son sunset tail tail tuft tongue tuft 7798141