Permission

Sometimes, I see my works edited and used without my permission in internet. I am not angry or anything, rather, I feel flattered because my art is good enough to be used in other works. But, I cannot help but thought, hey, it's my art, yeiy someone  used it, but why I never knew, no one ever told me that they used my works. So, if you want to use my arts, please tell me so I can check it. I won't bite .-. I swear.