abs anal anal_penetration anthro anus balls biceps black_nose bodily_fluids cum cum_from_ass cum_in_ass cum_inside cum_while_penetrated duo genital_fluids genitals horn humanoid_genitalia humanoid_penis male male/male muscular muscular_anthro muscular_male nipples outside pecs penetration penis sex size_difference spread_legs spreading theaifurden canid canine canis dragon mammal wolf hi_res signature