What's the most popular major in yaoi/BL?

I feel like this question's already been asked before but I can't seem to find a post so; in BL set in college/university settings: what majors would you commonly see?

I want to say marketing or business, but while I was looking through a list of university BL manga I found theres a lot of (someone) x law student or law student x law student.

I feel like you don't see STEM students that often but I could be wrong. I heard there was a trend with engineering students in thai BL, for example.