But even those terms a human can only understandable from a human standpoint. I'm guessing that pleasure for a bee is nothing at all like pleasure for me, but I cannot avoid projecting my own experience when I think about the bee's experience.
Our understanding of shared traits among various animal types makes it possible to extrapolate reasonably that what these animals experience is not dissimilar to what we experience in terms of raw sensations.
What it's like to be a bee by Lars Chittka, professor of sensory and behavioral ecology, Queen Mary University - London