FURVERT!

5_fingers all_fours anal anal_penetration anthro backsack balls blue_eyes butt canid canine countershading doggystyle duo echidna erection fingers fluffy fluffy_tail fox from_behind_position fur genitals half-closed_eyes hi_res knuckles_the_echidna looking_pleasured male male/male mammal miles_prower monotreme narrowed_eyes open_mouth penetration rear_view red_body red_fur sega sex signature simple_background sonic_the_hedgehog_(series)strawbebbypup tail white_body white_fur yellow_body yellow_fur