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She freezes the bouquet. She doesn't tell anyone, of course; doesn't really understand herself. She's not sure if the cold will save the petals, preserving them for the future why should she? She knows bones but she finds herself wanting to try. She tries to reason why with her own mind. It's not because she was left at the alter with Booth. She is an anthropologist bones aside and she wants to study and understand such social institutions as marriage. She ignores the human voice buried underneath, the one that wonders if she will ever preserve her own bridal bouquet.