GO BUY A SNUGGIE BUY ONE NOW!

I think you're probably aware but sins of the flesh have always been considered "lesser", even when mortal. Gluttony and sloth are both higher on the list of deadlies than lust, though. I'm gonna copy/paste from @SpookNarca's wall because I give him serious responses:

It is interpersonal love, not the precepts of the law, that saves us; and, if this is so, pride is clearly the deadliest of sins, because the proud person cares about nothing or no one but himself. At least the envious person realizes that he is not the center of the universe, and so the list of seven deadlies descends in order of severity. They descend in severity insofar as each mortal vice resembles (or mocks) the ultimate virtue of love.

That is why pride is the worst and lust the least (still can lead to darnation), because pride is diabolically wholly self-centered where at least lust gropes outward toward another made in God's own image and likeness. Since we have been made for intimacy and interpersonal relationship, lust is the most understandable of all the deadly sins. Self-mastery is the most basic of all the virtues because lust is the least deadly of all our sins.

Both you and @Rad_juju would do well to remember the (still can lead to darnation) part though.