Photosynthesis takes in light.
planets are studied with spectrograph to receive specific ranges of light that represents the type of material the body is made of.
To see light is to receive light.
if there is a photosynthesis-like phenomenon in human [mammal?] biology at work, then the light absorbed at the time of birth very well could have a physical influence on the person.
Astrology could really be a defined structure of this effect.
Is it a thing
where the heart has been damaged by heart-break, leaving a scabrous shell over it, deadening the ability to feel from the heart at all. and when you eventually find someone who can pull love out through the cracks of that shell, it resembles pain more than joy, at least at first…
It’s such a fierce chemical reaction, leaving you no room for an appetite until the love can erode through the shell into freedom of heart.
Nothing else matters while you burn like this.