The title of the poem is important, because it is the only indication of the characters who are the subject of the poem. In the poem, Yeats assumes that the reader is familiar with the myth referred to in the title. Throughout the fourteen lines, he never uses the names of either of the characters. Zeus's name in fact appears neither in the title nor the text of the poem; the reader is expected to understand that the swan is an incarnation of the all-powerful god.
The text of the poem is also important for the reader to understand. In lines 1-4 of the poem, the reader can see that Leda is being attacked. It goes in to detail about her thighs being caressed. At this point the reader is starting to understand that there is some sexual images in the poem. Yeats' captures the image with "wings beating still above the swaggering girl" and "her nape caught in his bill". Yeats contrasts those images with the soft images of "her helpless breast upon his