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5_toes anthro anus anus_only biped bulge butt clothed clothed_anthro clothed_male clothing feet greyscale hewge hi_res jockstrap jockstrap_only looking_at_viewer male male_anthro mammal monochrome mustelid otter presenting presenting_anus presenting_hindquarters puffy_anus simple_background smile solo toes topless topless_anthro topless_male underwear underwear_only