Any of you who have been to my book signings know I tend to move back and forth between reading my stuff and doing Q&A.

I do this partly to break up the potential monotony of an hour of straight reading, and partly because I really like to answer questions. Any sort of question, really. That's part of the reason I became a teacher, I think. And it probably factored into my decision to keep writing my College Survival Guide for about 10 years.

I even, believe it or not, wrote a sex advice column...