Rule 34 Dev - 2021 absurd_res anal anal_sex andrefil360 anthro anthro_on_human anthro_penetrating_human ball_gag balls collar duo equid equine gag genitals glowing glowing_eyes hi_res horse human_on_anthro human_sub male male/male mammal medial_ring muscular muscular_male nipples penetration penis red_eyes slave stomach_bulge vein veiny_penis|5982703448