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1:1 2013 abs animal_genitalia anthro athletic bat biceps biped claws conditional_dnp danza erection flexing fur genitals glans grin hair half-closed_eyes hi_res humanoid_genitalia humanoid_penis looking_at_viewer male mammal membrane_(anatomy)membranous_wings muscular muscular_anthro narrowed_eyes nude pecs penis pinup pose presenting sheath simple_background sketch smile solo standing vein white_background wings