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2013 anthro anthro_on_anthro anthro_penetrated anthro_penetrating anthro_penetrating_anthro balls biceps big-red big-red_(character)big_balls big_muscles big_penis brown_body brown_skin butt dragon duo erection european_mythology faceless_anthro faceless_character faceless_male fangs fellatio genitals green_eyes horn huge_balls huge_penis humanoid_genitalia humanoid_penis hyper hyper_balls hyper_genitalia hyper_penis larger_male larger_penetrated larger_sub licking lying male male/male male_penetrated male_penetrating male_penetrating_male manly muscular muscular_anthro muscular_male mythological_creature mythological_scalie mythology nidhogg_(monsterhoggart)nipple_piercing nipples non-mammal_ears nude nude_anthro nude_male on_front open_mouth oral oral_penetration orange_body orange_skin pecs penetration penile penile_penetration penis penis_lick piercing presenting red_body red_scales scales scalie sex sitting size_difference small_top_big_bottom smaller_male solo_focus spikes submissive tail teeth thick_penis tongue tongue_out vein veiny_penis western_dragon wingless_dragon yellow_body yellow_skin