Lasciviousness is “irregular indulgence of animal desires or the tendency to excite lust, and promote irregular indulgence” (Webster, American Dictionary).
“President Harold B. Lee has called our attention to the phrase ‘past feeling’ which is used several places in the scriptures. In Ephesians, Paul links it to lasciviousness that apparently so sated its victims that they sought ‘uncleanness with greediness’” (Maxwell, For the Power Is in Them, 22).