abs anthro anus backrooms balls bara barazoku big_ass big_butt big_penis black_body butt creepy darkened_anus erection evil_grin gaping gaping_anus genitals hands_behind_head horror_(theme) looking_back lying_on_back male muscular muscular_humanoid muscular_male nightmare_fuel nipples penis sharp_teeth simple_background smile solo spread_legs spreading teeth vein veiny_penis white_eyes rulethony34tano_(director) humanoid monster monstrous_humanoid smiler_(the_backrooms)