A contract is an agreement between two or more persons (individuals, businesses, organizations or government agencies) to do, or to refrain from doing, a particular thing in exchange for something of value. Contracts generally can be written, using formal or informal terms, or entirely verbal. If one side fails to live up to his/her/its part of the bargain, there's a "breach" and certain remedies for solving the differences are available. The terms of the contract - the who, what, where, when, and how of the agreement - define the binding promises of each party to the contract.
I think you misunderstand what a contract is
If you say so? However this discussion is about the terms contained within a
contract of carriage. Setting aside your examples of being a human
foie gras, I am not entirely clear what point you are trying to make? The original poster was arguing that the terms and conditions contained within his proposed contract, he felt, might be waived on the grounds of "common sense" or an EU travel directive that dealt with
common rules on compensation and assistance to passengers in the event of denied boarding and of cancellation or long delay of flights.