The relationship between women and man is the sweetest thing ever. The flirting, getting jealous is the best facts of life. You will miss that feeling once you are old enough.
Also, you will find very entertaining information regarding the relationship. For example, the things we do before and after 30 is a hilarious way to compare the relations. You see how naive and different you are before 30 and how thing changes after 30. There is a very cute animation that shows the differences that you must watch. You will enjoy the video so much that you will ask for more and more.