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anal anal_penetration anthro arms_tied balls bodily_fluids bound canid canine canis claws domestic_dog dominant dominant_male erection eyes_closed fangs fur gangbang genital_fluids genitals group group_sex humanoid_genitalia humanoid_penis leash lying male male/male male_penetrated male_penetrating male_penetrating_male mammal masturbation neeky_(alvorom)nipples on_back open_mouth penetration penile penile_masturbation penis precum richarddeus sex spread_legs spreading submissive submissive_male teeth tongue tongue_out vein watermark