The sentence, "Love you ten years before the Flood," directly contains a Biblical Allusion. This was a story about Noah and his ark where God sent a great flood to wipe out the bad deeds of men and clean off Earth of impurities and start anew. In the poem, the writer is trying to show his love for his mistress that is unstoppable and can go to great lengths.
When Scout's teacher tells Scout to hold out her hand, Scout believes that she is going to spit in it as a way of sealing oral contracts, although she wonders what kind of bargain they have made.
