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anthro ball_gag balls barocatto bdsm bondage bound chain collar defiant dialogue facial_hair forced gag gagged genitals goatee greyscale hands_tied hi_res kidnapping leading leash leash_pull male mammal monochrome muffled muscular muscular_anthro muscular_male mustelid nipples ollie_the_otter otter penis restraints rope rope_bondage slave solo vowelless vowelless_vocalization walking