Will work for underpants

I'm putting the kids in the car to take them to school.  As I'm buckling Josie in, I'm saying to Zeke, "come on, sweetie, hop into your seat and I'll come and strap you in."

"Where are we going, Mama?"

"We're going to school and then I'm going to work."

"Why?"

Josie, who is in that stage of language acquisition in which she repeats everything she hears without necessarily knowing what it means, parrots, "why?  why?  why?"

"Why do I have to go to work?"

"Yeah.  Why, Mama?"

I think for a second.  "Well, you know what money is?  What we use to buy things at the grocery store?"

"Yes."

"The way you get money is to do something for someone, to do some work, and then they pay you for it and give you money.  So Daddy goes to work and he gets money for the work he does, and I go to work and I get money for the work I do, and then we take that money and we use it to pay for the things in our life, like our house, our cars..."

"And food?"

"Yep, food's a big one."

"And underpants."

"Exactly.  Underpants are very important."

"Yeah." 

He goes back to looking out the window and humming to himself, satisfied that he has covered the bases.