16:9
3d_(artwork)
anthro
balls
big_penis
digital_media_(artwork)
duo
echidna
eulipotyphlan
garbage-chan
genitals
hedgehog
huge_penis
knuckles_the_echidna
male
male/male
mammal
masturbation
monotreme
muscular
muscular_male
penis
sega
sonic_the_hedgehog
sonic_the_hedgehog_(series)
source_filmmaker_(artwork)
widescreen
