I also didn't read for pleasure in my 20s and even much of my 30s. Forced reading in high school (of material I didn't enjoy, in quantity, and frequently fell behind on, and felt bad about failing) ruined it for me for about 15 years. But the trauma faded with time and now I read some 10-30 books a year. So maybe it's not permanent for your son's cohort either.
I second this. I hated (perhaps not consciously) being forced to read books in high school, however recently I’ve gone back and started rereading those books I was assigned and have loved it!
