Splintering Cane: Feminine Reactions

I told my wife that the friend I'm going to build bamboo rods with had bought a bamboo fly rod.
- Why he wants to build a bamboo rod if he already bought one? She asked.
Why do the birds sing? Why the green is green? What keeps a rock from crumbling into dust?

The friend told he was casting his split-cane in the yard. A lady, a neighbor, walks past with a dog and smiles.
It is January, there is snow on the ground, pretty cold, about a hundred meters to the nearest lake shore, frozen lake shore, a guy is casting a fly rod as old as she. What's there to smile about?