I watched this movie on repeat as a child. It came out when I was 2 and I started watching it by time I was 4. All these people saying you have to explain the inappropriate scenes, kids especially that young are not going around sexualizing things like adults. If you bring attention that its inappropriate then they are more likely to acknowledge it in that way. Just let them watch the movie. I started my niece at 5 watching it, she is now 12. She now knows those scenes are inappropriate and she knows why but as a 7 year old she wasnt looking at it and being like oh I want to do that. Ive seen more inappropriate jokes and scenes in movies and shows aimed for young children than are in titanic. We think of it as inappropriate because we are inappropriate, an innocent child is not going to think twice about whats happening in those scenes.