FURVERT!

1:1 aaron_(artist)animal_genitalia animal_penis anthro anus back_muscles backsack balls big_balls big_butt border brown_body brown_fur butt canid canine canine_genitalia canine_penis canis fur genitals glowing glowing_eyes hi_res knot knotted_penis male mammal moon muscular muscular_anthro muscular_male mythological_canine mythological_creature mythology nude outside penis showing_teeth solo vein veiny_penis werecanid werecanine werecreature werewolf white_border wolf