“Women are like creme brulee” is a metaphor, a beautiful and interesting metaphor that means something along the lines of women are like icebergs: there’s a bit on the surface but much more underneath. Except women aren’t cold and icy, rather they are warm and sweet and wonderfully delicious. They enrich our lives.
Excellent metaphors are extensions of analogies: they take one pattern that is seemingly initially complex and compare them to something familiar and known. These excellent metaphors bestow an understanding of concepts that are deeper than just an initial contrast, for what does a dessert really have to do with the love of a woman? But in digging deeper into the contrast which seems initially paradoxical, we discover within the nuances of the metaphor there is a complexity which actually conveys the idea: the warmth and sweetness of a woman.
Exploring that metaphor, we are able to understand things about the point of view of the speaker which are much deeper than originally thought. In essence, a metaphor is matching a pattern that we’ve seen before to something new.
The ability to communicate in metaphors with colorful language makes our speech exponentially richer and more subtle. I think it’s one of the highest levels of communication, more than fancy esoteric vocabulary because it achieves the end goal of communication: actually getting an idea across. And it does it simply with as few words as possible. Metaphors are grammatical levers.