This makes me think of Wittgenstein's point that words shape our reality and also limit our perception of reality. "Emotion" is a word that's a human construct.

Going along with this human construct, I wonder what the boundaries are among humans and animals when it comes to "emotions". Are there certain emotions that animals have that we can't tap into and, therefore, never experience?

And to go further, what role do sensory organs have with emotions? Does access to certain sensory organs influence this? For instance, fishes have access to the lateral line system to help them sense pressure gradients and their surroundings. It could be that they have unique emotions.