My girlfriend sometimes brings up past sexual activities or like talking about a movie and say she didn't watch it hinting at doing something. Now I get jealous every time she talks about it and gets mad at me for being jealous. Are we both in the wrong?
No, it's pretty normal to talk about past relationships. It's a part of her life, you shouldn't be trying to make her shut it out. You're being a little weird about it. You shouldn't be jealous about the past.