Rule 34 Dev - animal_genitalia animal_penis anthro balls big_penis biped bodily_fluids equine_genitalia equine_penis erection genital_fluids genitals looking_at_viewer male muscular muscular_anthro muscular_male nude penis precum sitting solo striped_genitalia striped_penis stripes obaum macgregor9797 equid equine mammal zebra hi_res|8665669740