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anthro arms_tied bdsm bondage bound clenched_teeth diaper dinosaur feces feeding_tube hands_behind_back hi_res laboratory laboratory_equipment laxative legs_tied male maxus_(steelshark)medical_instrument muscular muscular_male pooping prehistoric_species reptile restrained saurischian scalie scientific_instrument side_view soiled soiled_diaper soiling soiling_diaper solo steelshark suspension teeth theropod tyrannosaurid tyrannosauroid tyrannosaurus tyrannosaurus_rex unclean_diaper used_diaper using_diaper