The poem
When you and my true lover meet And he plays tunes between your feet. Speak no evil of the soul, Nor think that body is the whole, For I that am his daylight lady Know worse evil of the body; But in honour split his love Till either neither have enough, That I may hear if we should kiss A contrapuntal serpent hiss, You, should hand explore a thigh, All the labouring heavens sigh.

This poem haunts me on a regular basis ... when I was in college a graduate student and I debated feverishly the meaning of the line "Till either neither has enough."
Has anyone else struggled with this line? "Either" seems to require "or." Is Yeats asking us to question whether the lady's assumption that separating the bodily from the spiritual is correct? Thoughts?