masturbation is not in the sex laws. fornication is sexual immorality. no one is perfect. i know of know one that lives a perfect life and never sins ever. condemning and judging those that make mistakes and fall into sin is not the proper way to follow the example of Jesus.
if i made a list of all the temptations and sins that cause so many problems in our world, masturbation would not make my top 100. i think there are far more important things Christians should be focused on.