FURVERT!

anthro anus backsack balls beach biped black_body black_fur butt countershading digital_media_(artwork)erection fur genitals grey_body grey_fur humanoid_genitalia humanoid_penis knell_bell legs_up long_tail looking_at_viewer lying male non-mammal_balls on_back outside penis presenting presenting_anus presenting_hindquarters presenting_penis seaside sergal smile solo tail tail_tuft tuft yellow_eyes