She had fallen for his mind. While he slept, she would marvel at his frontal lobes, the parietal lobe, the temporal lobe, and the occipital lobe. She brainkissed him despite the neurotoxins. 
It didn’t matter whether he let her enter from the right or the left hemisphere of his mind. It didn’t really matter.
As long as she was floating somewhere in his cerebrospinal fluid, she felt afloat, alive and all those things that people feel when they stay afloat and alive in each other’s minds. 
It was never easy swimming in there. Diving from his forebrain to his midbrain and then crossing all the hurdles that led to his hindbrain was never easy.
It exhausted her.
But, brainkissing is exhausting.
Because, it should be.