Creatine isn't a steroid, it has no side effects down there (or anywhere for me for that matter, nor anyone I know who uses it, from basketballers, to body builders, to soccer players, to fighters, etc).
Steroids dont even cause a limp dick, they shrink your balls, just like cold water would. If it wasnt for my fear of needles and even bigger fear of bitch tits, I'd be tempted to try them myself.