@Neko Majin C
well now what you need to do is train you other arm to be really strong and usefull (if the arm you can that with is the dominant one)
then walk around with your “dead arm” telling all the ladies you lost your ability to use that arm when you were protecting your sister/mother/ex from a mugger, but when you were fighting him he shot (or cut) you in the arm, effectivly making it worthless
or, alernitivly, you were saving orfans from a burning building or you fought in a war
