Rule 34 Dev - 2015 ambiguous_gender anal anal_fisting anthro anthro_on_anthro asgore_dreemurr asriel_dreemurr bad_parenting ball_suck balls big_dom_small_sub big_penis blush body_hair boss_monster caprine chara chest_hair cock_worship collaborative_fellatio cum cum_in_mouth cum_inside cum_on_face cum_on_penis cum_on_tongue erection faceless_male father father_and_child father_and_son fellatio fisting foursome frisk fur girly goat group group_sex huge_cock human human_on_anthro humanoid_penis incest interspecies licking long_ears male mammal navel nipples oral orgasm overweight parent penis perineum presenting_penis pubes railroad_mejic retracted_foreskin semi_incest sex sibling simple_background sitting size_difference son son_blowing_dad spread_legs sucking sweat technical_incest tongue tongue_out uncut undertale video_games white_fur yaoi|3293390384