16:9
2016
3d_(artwork)
anthro
balls
canid
canine
darksorm
digital_media_(artwork)
echidna
erection
eulipotyphlan
fox
genitals
group
hedgehog
hi_res
knuckles_the_echidna
male
mammal
miles_prower
monotreme
nude
penis
sega
sonic_the_hedgehog
sonic_the_hedgehog_(series)
widescreen
