The lights get dimmer. The floor begins to tilt. The colors all swirl together and your feet seem to come loose from the earth. Did someone finally poison the sloppy joe mix at the school cafeteria? Did you all of a sudden forget how to breathe? No, silly. Just like the speaker in "Having a Coke with You," you're in love. As a result, your entire version of reality has shifted, right down to the physical level. Go to bed fine one night, but then wake up in love, and the world seems a totally different place.
As both art and being in love show, reality is a totally fluid and changeable thing. Especially for our speaker.
Love is not superior to art, in the speaker's mind. Instead, it's a replacement for art. His interest in both of them has more to do with escaping his reality than anything else.