" Carefully I leaned over and adjusted the baby blanket higher over his chest.
“Dane,” I said softly, “remember that thing you told me about the duck and the tennis ball? About how baby ducks get attached to the first thing they see after they’re born?”
“Imprinting.”
“How does that work again? . . .”
“After the duckling is hatched, there’s a window of time during which another creature, or even an inanimate object, is stamped onto his nervous system, and he becomes bonded to it. In the study I read, a duckling became imprinted to a tennis ball.”
“How long is the window of time?”
Dane’s voice was half-wary, half-amused. “Why? Are you afraid you’re the tennis ball?”
“I don’t know. It’s possible Luke is the tennis ball.”

-Ella & Dane "

― Lisa Kleypas , Smooth Talking Stranger (Travises, #3)