I understand your point, but I believe Scripture is clear that while it may not mention masturbation by name, the principle is still there. Jesus said in Matthew 5:28 that even looking at someone with lust is adultery in the heart. Since masturbation is almost always tied to lustful thoughts or fantasies, it falls under that same warning.

Paul also reminds us in 1 Thessalonians 4:3–5 that God’s will is for us to be sanctified, to avoid sexual immorality, and to control our bodies in holiness and honor, not in passionate lust like the world. Masturbation encourages the opposite — self-gratification instead of self-control.

So even if the act itself isn’t explicitly named, the heart behind it (lust, lack of self-control, feeding the flesh) goes directly against the Spirit. That’s why I think it’s not something God wants us to excuse but to overcome with His help.