A woman professor of mine told me something real interesting. She said that most guys have emotions that are connected to their fantasies when they masturbate. So when we jerk off as boys we create a fantasies that get us off the best way. Then when we get with a girl friend, it's a lot different because we can't control what's happening with a real person. Like we have to respond to her needs. I think that's why we like masturbating so much because it's fantasy that gets us off good every time in the same way. It's not better than real girls,it's just quick & easy.