A curious constitution

Back at the old place of employment, with wonderful big beasties frolicking around, biting each other, doing flips and trying to mate with the pool toys.

Now it's back to a schedule, with bedtimes and alarm clocks and such. Real life, in other words. What a relief.

I am not tired. I have a curious constitution. I never remember feeling tired by work, though idleness exhausts me completely.

Sherlock Holmes, from "The Sign of the Four"