Watching American film with your little brother

Now my brother almost 7 years old, and have not knowing yet about love in mature manner. A couple days ago I watched Benjamin button. It’s really common scene, if kissing activity had put on it. But, when my brother saw it I felt shame and I didn’t give any permission to saw it anymore. Hohohoho…As if I being Caught while I saw a porn film hwehehehhehe…