RALPH: Luxury comes from the Latin word luxuria, meaning extravagance or excessive indulgence. That's how it was used in Shakespeare's time, but it frequently had the sexual connotation of lustful indulgence — and that's certainly how it's meant here.

SARAH: It wasn't until the 18th century that it began to take on the meaning it has today. Luxury continues to mean extravagance — anything that is costly or choice in quality — but it also means whatever is conducive towards pleasure or a life of ease, to be contrasted with what is necessary or indispensable. It no longer has a specifically sexual, or immoral connotation.