At odd hours, I'll end up at McDonalds* because of Nostalgia. Not necesarily because of hunger. But mostly because I miss home. I miss getting picked up from the air port, I miss visiting my brother, I miss waiting for my mom to get home.
In a similar way, I become nostolgic when I end up at McDonalds at odd hours.
*dude I have no idea what this thing's even from but it's an awesome picture