Our speaker in "Having a Coke with You" is a looker. And we don't mean he's deserving of a wolf whistle. We mean that he looks at stuff—at the you of the poem, at sculptures, at portraits, at tulips, at birches. As a big fan of visual art, this speaker seems to understand the word primarily by the way it looks to him. That might explain why we get such a short, dramatic line like "I look" (13). It's more than a line, it's a declaration of what this speaker is all about. In light of it, it's easy to see (see what we did there?) why this poem is so overwhelmingly visual. Even his love for the you of the poem seems to hinge on appearances. Is that a good thing, do you think?
Appearance is subjective. In other words, the way things look depend entirely on your state of mind. (Happiness = fluorescent flowers.)
Art can never truly come near the simple experience of living life. (Nice try, though, art.)