Just too many classes and too many teachers in school and college that dealt with various forms of art and advertising. My degree was in Chemistry but I had to take some liberal arts classes to be "well rounded" as they said back then. In high school I did a stint as a yearbook photographer and editor so I learned lighting details, subject placement, and framing of the photo to show action or elicit feelings. I also had to create caption for the pictures and copy for the articles.
I found that side of the brain to be interesting and creative.