This document discusses the concept of consideration in contracts. It defines consideration as something of legal value that is bargained for and given in exchange for an act or promise. Consideration must flow from both parties to a contract and can take several forms, like a promise to do or not do something. The document outlines several rules for consideration, like that it must move at the desire of the promisor. It also discusses exceptions to the rule that without consideration there is no contract, like natural love and affection in some cases. Privity of contract, or strangers to a contract, are also addressed, along with exceptions where a third party can sue.