It could also be that you instinctively know how to handle Thurs energy. Thurs is double sided, most people tend to encounter it blade side up, and get cut, but if you instinctively know how to 'handle' that thorniness so that you can essentially hold it from the 'stave' instead of at the pointy end, what you have instead is an effective weapon.

More power to you, if that is the case, since that's something that many people struggle with.