Her partially open lips now ...

Her partially open lips now opened wide, and her soft, fragrant tongue entered his mouth, where it began a relentless search for unformed words, for a secret code engraved there. Tengo\'s own tongue responded unconsciously to this movement and soon their tongues were like two young snakes in a spring meadow, newly wakened from their hibernation and hungrily intertwining, each led on by the other\'s scent.
Her partially open lips now opened wide, and her soft, fragrant tongue entered his mouth, where it began a relentless search for unformed words, for a secret code engraved there. Tengo's own tongue responded unconsciously to this movement and soon their tongues were like two young snakes in a spring meadow, newly wakened from their hibernation and hungrily intertwining, each led on by the other's scent.

Quotes from the same author

Exerting yourself to the limit over and over again, that is the essence of running. Running is painful, but the pain doesn't leave me, I can take care of it. That agrees with my mentality.
You are 27 or 28 right? It is very tough to live at that age. When nothing is sure. I have sympathy with you.
When I write about a 15-year old, I jump, I return to the days when I was that age. It's like a time machine. I can remember everything. I can feel the wind. I can smell the air. Very actually. Very vividly.
Don't pointless things have a place, too, in this far-from-perfect world? Remove everything pointless from an imperfect life, and it'd lose even its imperfection.
She's letting out her feelings. The scary thing is not being able to do that. When your feelings build up and harden and die inside, then you're in big trouble.