Not this again

It's 5:42 a.m. Why can't I sleep? Why have I slept a grand total of 45 restless minutes this night?

Edited to add: The answer is now clear. I was keeping myself from having the sex dream about Will Ferrell that I must have somehow known I was going to have when I finally did fall asleep. While I take great guilty pleasure in Ferrell's work and think this is truly the most brilliant thing I have ever seen--sex with him? Not so much. Not so much at all.