My nephew, Beau, keeps me on my toes. Keeping on my toes is a good way to develop balance and agility. It is also a good way to fall on my face and embarrass myself. But since I don’t spend a lot of time with teenagers -- and not nearly enough with Beau -- I am trying. Right now, he’s trying to convince me that I need a mechanical keyboard for my computer. I am old enough to remember typing class in high school. The “thunk, thunk, thunk!” sound of hitting keys is not a pleasant memory. My parents gave me a state-of-the-art typewriter when I left for college, and it had (wonder of wonders!) a self-correcting function, which was a huge improvement over the machines from high school, but it was still messy and time-consuming. Then I didn’t write anything for years and, by the time I wrote again, I was using a wireless keyboard and wireless mouse with a great big monitor. Now, when I see typewriters, rather than experiencing a pleasant nostalgia, I feel something closer to dread. But…