a first?

This may actually be the first time I’ve ever given two lectures on the same day. I’ve done back-to-back days before, but never this.

One thing that happens in these cases, by the way, is that you get pretty dehydrated. You lose a lot of water vapor from talking too much.

A friend of mine was once ordered to stop teaching during the final few weeks of pregnancy, because she was losing 2 pounds per day just from teaching three classes.