You say "potato", I say, "Give me all the food right now."

I've noticed that some other couples do this thing where they don't eat dinner until 9 or 10PM. What?! Unless there is some unusual occasion where you have something immediately after work, why wouldn't you then go eat dinner. And, why aren't you starving by 6, much less 9?! I'm so confused by this, and cannot relate at all. Priorities, people...