Merleau-Ponty argues that the body's materiality is the primary source of its ugliness because it is subject to decay, disease, and death.

Merleau-Ponty uses the term "opacity" to describe the body's resistance to our understanding. He argues that the body is not a transparent object that we can fully know, but rather a mysterious and opaque entity that we can only partially grasp.

Merleau-Ponty argues that the body's opacity contributes to its ugliness in a number of ways. First, it makes the body seem alien and unfamiliar. Second, it prevents us from fully understanding and appreciating the body. Third, it makes the body seem more vulnerable and fragile.

Merleau-Ponty argues that the body is the vehicle of the soul, meaning that it is through the body that the soul expresses itself in the world. He rejects the idea that the body is the prison of the soul, arguing instead that the body is an essential part of the human being.

Merleau-Ponty's understanding of the body as a source of ugliness challenges traditional notions of beauty in a number of ways. First, it suggests that beauty is not a fixed or objective quality, but rather a subjective and personal experience. Second, it suggests that beauty is not limited to the physical body, but can also be found in the mind and the spirit. Third, it suggests that beauty can be found in the most unexpected places, even in the most ugly and repulsive things.