Rule 34 Dev - 2boys 2d artist_request bara beard body_hair completely_nude completely_nude_male crossover doom doom_slayer_(doom) facial_hair from_behind from_behind_position gay gay_sex glasses gordon_freeman hair half-life half-life_(series) half-life_2 male male_only multiple_boys muscular muscular_male nude nude_male under_covers yaoi|9263487088