anthro anus backsack balls big_balls bottomless bottomless_male chair clothed clothing furniture genitals huge_balls inside looking_at_viewer male muscular muscular_male on_chair presenting presenting_anus presenting_balls puffy_anus raised_tail rear_view saggy_balls shirt sitting sitting_on_stool smile solo stool tail_aside tank_top topwear anonymous_director equid equine horse mammal hi_res