Rule 34 Dev - 2boys alpha_male anal anal_sex artolius beefy canid canine daddy echidna enlisentity fox fraternity gay gay_anal gay_sex knuckles_the_echidna lugiem male male/male male_only mammal manly monotreme penetration sega sex size_difference sonic_(series) sonic_the_hedgehog_(series) spreading stomach_bulge tails tough_guy|9655488216