Romance novels aren't known for their fresh metaphors. The genre is meant to be palatable and easy to enjoy even if your critical thinking skills are disengaged. Not that there's anything decidedly unsexy about a knotty metaphor (Ha! Ha!) -- it's just that parsing out the symbolism of an hour-long thunderstorm won't get the job done as quickly as, say, comparing a woman's "deep gaze" to the "midnight sky." So if you're looking to spruce up your language use, adorning it with novel comparisons, romance novels might not be the best place to start. But Google, hoping to elevate the conversational skills of its Artificial Intelligence, thought otherwise.