Not a very good reason. In the spring of 1997, I was taking a very unpleasant computer science class. In hindsite, I'm no longer certain why it was so terrible. The most likely cause, however, was that I didn't program much for the class. I love to program.
Programming is fun.
Not-programming is not fun. Reading a dry book and struggling with dull theory instead of programming is very not fun. Being a bitter ball of frustation, I did what any college student does, I skipped class. Lots of class. I had not skipped much class in my previous seven semesters, but I probably skipped over half of this particular class.