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621_(number)anal anal_fluids anal_masturbation animal_genitalia animal_penis anus balls bed bodily_fluids butt canid canine canine_genitalia canine_penis corvidtree cum cum_drip cum_on_penis cumshot dripping ejaculation erection feral furniture genital_fluids genitals grinding hi_res knot knot_in_sheath knotted_penis leaking_precum male mammal masturbation monochrome musk musky_anus musky_balls musky_penis penile penile_masturbation penis pillow pillow_humping precum precum_drip precum_on_penis precum_squirt presenting presenting_anus presenting_balls presenting_hindquarters raised_tail scent_marking sheath sketch solo spread_legs spreading sweat sweaty_balls sweaty_butt sweaty_genitalia tail