Outside appearance of form = unconventional. Not a sonnet. like Tom and Daisy's marriage, unconventional. Inside regularity in form = 4 stanzas of 6 lines, repeated refrain, cyclical structure. The Buchanan's, much like the poems structure, have a controversially immoral outside image to their relationship. Yet internally, their motives have always been the same. They both deal with their urges to venture outside of the marriage, but then they both "always come back" to eachother and return to their comfort.