after_sex animal_genitalia animal_penis anthro anus backsack balls bodily_fluids brown_body cum cum_from_ass cum_in_ass cum_inside cum_on_ass equine_genitalia equine_penis erection genital_fluids genitals male muscular muscular_anthro muscular_male penis perineum raised_tail solo redfoxthing_idk equid equine mammal attempted_signature