What harm does it do for girls to read pornographic books?

Nothing. I'm a little curious in adolescence. I saw it when I was a teenager (I was a man), and my sister found it and beat it up. Haha, actually, reading pornographic novels or something is nothing. Don't read too much. I'm young, mentally and physically immature, and sometimes it's easy to think, which will affect my study and life, and I'll go to college, fall in love, and even ... you know, what will happen to both sexes?