Rule 34 Dev - 2023 2boys ai_generated anal anal_sex anthro anthro_on_human anthro_penetrating_human avaru biceps big_penis black_nipples black_penis bodily_fluids caprine caprine_demon claws dark_body dark_fur demon duo fucked_silly fur gay gay_sex genital_fluids genitals goat goat_demon grey_body grey_fur hair horn human human_on_anthro humanoid humanoid_genitalia humanoid_penis interspecies male male/male male_focus mammal muscular muscular_male nipples penetration penis precum sex size_difference solo tagme vein veiny_penis white_hair yaoi|11470367848