Simon Blackburn in defence of Lust (despite of the Bush administration and the Holy See) ;-P

In many lists of the Seven Deadly Sins, lust is replaced by luxuria or luxury. This is not an innocent mistake, but reflects the urge to inject something morally obnoxious into the definition. If we associate lust with excess and surfeit, then its case is already lost. But it is a cheap victory: excessive desire is bad because it is excessive, not because it is desire.