Who needs sleep? Tell me what's that for

I mentioned in passing a couple of days ago that I had a very poor night's sleep one day last week. I was stopping at a friend's house, and I retired to bed in a sleeping bag on an air mattress.

It was a pretty comfy air mattress, and I settled down... and didn't go to sleep. I continued to not-go-to-sleep more or less until it was time to get up again.

( The state of asomnia )