Sartre explains that "the look" is the basis for sexual desire , declaring that a biological motivation for sex does not exist. Instead, "double reciprocal incarnation" is a form of mutual awareness which Sartre takes to be at the heart of the sexual experience. This involves the mutual recognition of subjectivity of some sort, as Sartre describes: "I make myself flesh in order to impel the Other to realize for herself and for me her own flesh. My caress causes my flesh to be born for me insofar as it is for the Other flesh causing her to be born as flesh."
We walked down the path to the well-house, attracted by the fragrance of the honeysuckle with which it was covered. Some one was drawing water and my teacher placed my hand under the spout. As the cool stream gushed over one hand she spelled into the other the word water , first slowly, then rapidly. I stood still, my whole attention fixed upon the motions of her fingers. Suddenly I felt a misty consciousness as of something forgotten--a thrill of returning thought; and somehow the mystery of language was revealed to me. I knew then that "w-a-t-e-r" meant the wonderful cool something that was flowing over my hand. That living word awakened my soul, gave it light, hope, joy, set it free! There were barriers still, it is true, but barriers that could in time be swept away. *