I don't do it too often. I don't want to get fat. But every few weeks the monster comes out. On vacation week, it comes out a few more times.
Also, somehow, with age, I've become this weird early-riser. Even if I go to bed late (I type this right now at 1:14 AM, my time), I'm still up with the roosters, most days.
On vacation, you can always take a nap at 11 AM.