"Grandma, where is your little brother?"
"Well, Tuck, I don't have one."
He was stricken.
"What? You don't have one?"
"Nope. I only have sisters."
"Not even a big brother?"
"Not even a big one. No brothers at all."
"Well, you should get one, Grandma."
"Oh, really? And where should I go to get one?"
"You should go to where the Lost Brothers are. You could have one of those."
Apparently, some brothers don't appreciate the one they have, so she could snag one of those brothers to keep.
He truly can't imagine life without one.