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5_fingers 5_toes absurd_res anthro anus backsack balls barefoot biped blush bottomless clothed clothing condom_wrapper embarrassed erection eulipotyphlan feet fingers flaccid footwear foreskin genitals gesture gloves grose hands_behind_head handwear hedgehog hi_res humanoid_genitalia humanoid_penis looking_at_viewer lying male mammal masturbation monochrome mostly_nude multiple_poses multiple_scenes muscular muscular_anthro muscular_male nude penile penile_masturbation penis pose presenting seductive sega shirt shoes sketch small_balls small_penis smile solo sonic_the_hedgehog sonic_the_hedgehog_(series)standing toes topwear traditional_media_(artwork)waving