Rule 34 Dev - 2boys alien anal anal_sex bar_censor bathroom bound bound_wrists completely_nude erection gay gintama gintoki_sakata green_skin hedoro interspecies legs_held_open lotion male male_only monster nude on_back on_floor penis penis_size_difference questionable_consent restrained spread_legs steam tagme wince yaoi yume_tsubame|1196047184