When you start copying porn films, you can lose sight of what really turns you on. The most important thing during sex is to experiment as much as you can, but to keep lovemaking as an experience which brings you closer to each other. Systematically imitating rough sex, domination and submission or S&M can stunt a relationship in the early stages and stop real love from developing. If you misjudge your partner, it can even cause psychological problems, so make sure you are both up for it before you start, although hvaing said that, there's nothing wrong with taking things a little further in the bedroom, if you both find it a turn-on.