Your case would be helped if you stop reading Nazi Bible scholars who conspired with Hitler to exterminate Jews. “Kittel, Bromiley and Friedrich”—can be flushed down the drain of history. Truly hair-raising that you cite them as authorities, saying I have to believe them?
Let me help wean you off the Nazism, and update you on the porneia debates. Here’s a few sources that were not written in Nazi Germany:
Bruce Malina (“The N.T. evidence is not at all clear”)
Kyle Harper (“its meaning has remained elusive for modern interpreters”)
David Wheeler-Reed, Jennifer W. Knust and Dale B. Martin (“But exactly what it refers to remains a mystery.”)