If you rightly understand what covetousness and lasciviousness are that nearly or altogether sums it up. You can have one of these or both of these at the same time.
Lascivious is sensual gratification related to sexual desire- and this can be accompanied or unaccompanied by coveting.
Covetousness is desiring that which is another's and/or exalting a desire for something or someone inordinately- and this can be accompanied or unaccompanied by lasciviousness.
So just because you do not desire to actually be with a woman as your wife or girlfriend doesn't mean it's okay to look at her, interact with her, or think of her with a lascivious purpose.
And just because you do not have lascivious intentions does not mean that it's okay to desire another man's wife to be yours and/or long after any woman who is not your wife (if you are married) and/or obsess over making a woman your wife (even if you're both single- obsession is still idolatry and these are related to inordinate, unmoderated desire).