FURVERT!

anthro anus backsack balls bent_over big_butt bubble_butt butt butt_focus echidna fur genitals knuckles_the_echidna looking_at_viewer looking_back male mammal monotreme nude open_mouth perineum presenting presenting_anus presenting_hindquarters purple_eyes quills_(anatomy)raised_tail rear_view red_body red_fur sega simple_background smile smirk solo sonic_the_hedgehog_(series)squish_(artist)tail tan_body tan_skin teeth tongue