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2019 anthro anus backsack ball ball_gag balls bdsm bernese_mountain_dog bodily_fluids butt canid canine canis collar domestic_dog feet gag gagged genital_fluids genitals hi_res hindpaw illbarks leash male mammal molosser mountain_dog paws petplay presenting presenting_hindquarters roleplay ruska solo submissive submissive_male swiss_mountain_dog tennis_ball tennis_ball_gag