Why does pagan idolatry always involve immorality?
Pagan idolatry involves immorality because it is satanically controlled; such immorality is part and parcel of it. The biblical account of the golden calf shows the people were naked, and Aaron made them naked to their shame. Pagan mythologies and idolatry always include rank immorality.
Les explains that when Moses looked further, he saw the people were naked, for Aaron had made them naked to their shame among their enemies. This was not casual worship with native folk dancing; it was naked and immoral. Les teaches that whenever you go into abject pagan idolatry or the mythologies, the Greek gods, and so forth, you always have rank immorality. It is just part and parcel of it because it is satanically controlled. The event resulted in 23,000 put to death through the plague. Paul uses this to shake up the Corinthians and bring them out of their temptations, and it applies to us as well, for we are no different from the Corinthian believers.