Rule 34 Dev - 1boy 1male abs balls bara beating_off biceps big_penis clothed_masturbation erect_nipples erect_penis erection functionally_nude furrowed_eyebrows green_eyes grin hairless_balls hard_on jacking_off jerking jerkingoff kuroshinki looking_at_penis looking_pleasured male male_focus male_masturbation male_nipples male_only manly masculine masturbating masturbation mole_under_eye muscles muscular muscular_male mushoku_tensei nipples no_body_hair obliques one_handed_masturbation open_mouth open_pants pants_down pants_open paul_greyrat pecs penile_masturbation penis penis_out shirtless sitting sitting_on_bed smile solo solo_male stiffy stroking stroking_cock stroking_penis topless vein veiny veiny_muscles veiny_penis wanking|5861141832