If my darling were once to decide
Not to stop at my eyes,
But to jump, like Alice, with floating skirt into my head,
She would find no table and chairs,
No mahogany claw-footed sideboards,
No undisturbed embers;
In the story  Alice’s Adventures in Wonderland  by Lewis Carroll, Alice finds a rabbit hole big enough for her to fit in she then jumps into it blindly not knowing what she will encounter. 
 
 The romantic reference to the “floating skirt” suggests freedom and gentle feminity. This contrasts ironically with the oppressive narrowness of the poet’s head.  Within this space “my darling” will find cynicism and a negative view of society.
If My Darling