Im going to have to agree with Yahweh on this one.

10. Thou shalt not covet thy neighbour's house; thou shalt not covet thy neighbour's wife, nor his manservant, nor his maidservant, nor his ox, nor his donkey, nor any thing that is thy neighbour's.
Whether youre Jewish or atheist, its a damned good commandment to live by.. it'll save you a bunch of trouble.