Can we use science to explain a creature that feeds on emotion?

This is a magic world question, and we certainly do not have anything on this planet which feeds on emotion. But if we did, I'm wondering how it might work with a look at science for something plausible. Feasting on particular pheromones in the air? It could eat other things as well, because just living on fear doesn't seem practical. (But if anyone can think of a way for it to JUST live on fear, party on! And let me know.) No matter what, this is going to be a stretch. I've been trying to figure out how one would google it and where the heck to start. If your answer is no, don't bother answering. I already know it's close to an impossibility. Again, looking to stretch the bounds of science to explain a creature which feeds on fear and how that would be managed.

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Can we use science to explain a creature that feeds on emotion?

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