“Leeda moved down the row slowly, picking expertly, doing a touch test on the fruits whose ripeness she doubted. If she picked them too soon, they wouldn't taste sweet enough because they wouldn't have time to draw in enough sugar. If she picked them too late, she knew, they would have already started producing ethylene, a chemical that ripened them, and they'd be overripe by the time they were sold. Their first summer on the orchard, Birdie had revealed to them that the world of peaches was more intricate and varied than they ever imagined. Clingstones, the ones that clung to their pits, ripened earliest, then semi-frees, and then freestones. Each variety was like a different dog breed with vastly different characteristics---the texture of the meat, the fuzziness of the skin, the strength and sweetness of the flavor.”