When I dream that I'm back in high school, I'm not a teenager. I'm whatever age I actually am when I have the dream, and my dream brain rationalizes a perfectly-fine-at-the-time explanation as to why I'm there.
As I advance deeper into my 30s, it becomes more difficult to justify my presence. Last night the reasoning was that I had gotten a job without adequate training, so I had to go back to high school to pick up whatever training I was missing. As I sat in class, I realized that I was older than my blue-wigged teacher, and decided I would write a post about how odd it was for a high school student to be older than his own teacher.
Then I woke up and actually did that. Sorta.