The painful realization that you are growing old...

I realized something this morning, and it goes like this: you don't realize that you've spent the past year or so going to be bed at around 10 pm every night until your younger brother comes to town and you go to bars and do NOT go to bed until 2.30 am. Yow. Used to be I could bounce back from that in a day or so, but now...not so much. What the hell, age.