Rule 34 Dev - abs anthro anti_dev bat biceps chair clothed clothing erection facial_hair fangs frat_bat goatee half-closed_eyes hat humanoid_penis looking_at_viewer male male_only mammal monochrome muscular muscular_male nipple_piercing nipples open_mouth partially_clothed penis piercing presenting pubes purple_and_white simple_background sitting sketch smile solo underwear white_background|3058948536