I not being a big fan of the traditions of men (Catholic, Protestant, or otherwise) say that these quagmires always develop as the result of not being from God.

The tradition of man defined lust and then back imposed it upon the biblical meaning of the word. I have to state the obvious... the word of God takes precedent over the words of men... otherwise its all for naught.

There is nothing in the Bible about lust between a husband and a wife being wrong. The marriage bed is undefiled (Hebrews 13:4).

Ornan's sin was in his willingness to have sex with his brother's widow and not fulfill raising up and heir to his dead brother... which didn't refrain him from the intercourse.

Honestly... I never understood the Catholic mind set... how folks made to feel so guilty about sexual relations could be expected to have big families... and the imposed celibacy on the priesthood and the monasteries and convents...