Masturbation hurts your mind and body, and everyone you interact with in this lessened version of yourself. Do we determine we can sin because some sins are worse than others?
I understand the surgeon general came out or whatever and said it was healthy, and I was even taught it was healthy in my sex ed class in college, but these people aren't seeing the bigger picture of the mind and body relationship.
I don't get too far into these teachings because they seem occultish and new agey but the message isn't. There is a chemical secreted by the medula that covers the spinal cord and then this reaction travels back up to your "brain". In order for your medula to secrete this chemical you cannot abuse/squander sex, masturbate or have excessive sex.
So by abstaining you actually receive health benefits to your mind and body that far outweigh the temporary relief of masturbation, and it will take more than a week, two, or maybe three to begin fully seeing these benefits. A healthier mind not fixated on sex is one benefit, another is a healthier spine with less tension and more feeling.
I'm uncomfortable with the direct symbolism they use with the story of Christ, but there really are 33 vertebrate and 12 cranial nerves. The big is the small in a sense, doesn't undermine either from being true.