FURVERT!

2d_animation 4:5 ai_(puyo_puyo)anatomically_correct anatomically_correct_genitalia anatomically_correct_penis animal_genitalia animal_penis animated animated_gif anthro balls becoming_erect biped canid canine canine_genitalia canine_penis canis darkajugin domestic_dog erection fully_sheathed fur genitals grey_body grey_fur knot looking_at_genitalia looking_at_penis male mammal nude penis puyo_puyo puyo_puyo_tetris retracted_balls sega sheath short_playtime simple_background sitting solo spread_legs spreading throbbing throbbing_penis tight_balls unsheathing y_sheath_opening