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abdominal_bulge anal anal_penetration animal_genitalia animal_penis anthro balls big_balls big_penis bodily_fluids breasts clothed clothed_sex clothing deedeelapin diadorin duo equid equine equine_genitalia equine_penis erection eyewear foreskin genital_fluids genitals glasses gynomorph gynomorph/male gynomorph_penetrated horse huge_balls huge_penis humanoid_genitalia humanoid_penis internal intersex intersex/male intersex_penetrated male male_penetrating male_penetrating_gynomorph male_penetrating_intersex mammal murid murine muscular muscular_male nipples penetration penis precum proportionally_endowed_gynomorph rat reach_around retracted_foreskin rodent sex smile standing tongue tongue_out vein wistfane