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2014 3:4 abs ankylosaurian ankylosaurid ankylosaurus anthro biceps big_bulge bound bulge chain chained clothing collar dinosaur grey_background hi_res jockstrap komboochie male monochrome muscular muscular_anthro muscular_male nipples non-mammal_nipples ornithischian pecs prehistoric_species reptile scalie seth_(enjay16)simple_background solo spiked_collar spikes standing thyreophoran underwear undressing