1.) Most gamers are boys (Therefore, it's not a girl thing)
According to the Washington Post, women account for nearly half of the gamer population. You might think that people already know this by now, but there are still a lot of folks that believe that gaming is purely a male thing. My family, peers, and even people in my job think that liking video games was simply a phase.
Ladies, show people the article I linked if they give you a hard time to.