I was in the bathroom washing my mouth out with Listerine Mouthwash & my brother seen me doing it & he said to me ''Did you know that is no good for you, it can give you cancer'' & i was like ''what'' i was so scared & worried.. he said he read it & also heard about it, should i ask a dentist if this is true & can happen? if so. . . . how can it give you bloody cancer???? should i stop using it??? have any of you ever heard of this, what do you think??