I had an English professor that was really into etymology (how the meaning of words change over time). Like, today kids say something is "sick" and that means it's awesome. We had to seek out the Oxford dictionary for that class. If I remember correctly, the original meaning of the word lust was the luxury of having a wife. So if one guy asked another if he had lust and he responded, yes, it meant he had the luxury of having a wife.
He also had us breakdown words to their root meaning. Such as, astronaut. Astro means star, naut means sailor, so astronaut actually means Star Sailor. Kind of nice.