Rule 34 Dev - 2boys armpit armpits batman batman_(bruce_wayne) batman_(series) black_hair bruce_wayne damian_wayne damian_wayne_(dcamu) dc dc_comics dcamu duo duo_focus father_and_son gay gay_domination gay_sex human incest male male_focus male_only muscular muscular_male nsfw robin_(damian_wayne) robin_(dc) skinny yaoi young|12551433120