I'm 14 and a girl. I love martial arts and have always wanted to take them. I fight with my brother allot (ever since we were little kids) and I always lose... If I lose fighting with my brother over a candy bar than how can I protect myself from someone attacking me? I do parkour and martial arts will help me condition for that. I love being active and really want martial arts. But the thing is that I take piano class (its my eighth year this year) and my family spends $40 dollars a week on piano class. I can't quit piano class. How can I convince my parents? I'm an all A student. Thanks!!!