Rule 34 Dev - 2020 after_anal after_sex all_fours animated_skeleton anthro anus asgore_dreemurr ass big_ass big_cock big_penis blue_anus blue_glans blue_tongue blush bodily_fluids body_hair bone boss_monster bottomless bovid bubble_butt caprine clothed clothing cum cum_in_ass cum_inside cum_leaking cum_leaking_out_of_anus dialogue duo english_text gaping gaping_anus gay genital_fluids genitals goat hairy hi_res hoodie huge_cock humanoid_genitalia humanoid_penis kneeling legwear looking_back looking_behind looking_pleasured male male/male male_only mammal messy mkcrown muscular muscular_male naked nude penis pubes sans size_difference skeleton smaller_male smile socks speech_bubble text text_bubble topwear undead undertale vein veiny_penis video_games white_body yaoi|4189093040