Briffault's Law
Briffault's Law: "the female, not the male, determines all the conditions of the animal family. Where the female can derive no benefit from association with the male, no such association takes place"
By Robert Briffault (1876-1948), an English surgeon, anthropologist, and author.
Briffault added 3 corollaries:
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Even though a woman has accrued past benefits from her relationship with a man, this is no guarantee of her continuing the relationship with him. (Translation: What have you done for me lately?)
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If a woman promises a man to continue her relationship with him in the future in exchange for a benefit received from him today, her promise becomes null and void as soon as the benefit is rendered. (“I will gladly pay you Tuesday for a hamburger today.“)
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A man’s promise of a future benefit has limited ability to secure a continuing relationship with a woman, and his promise carries weight with her only to the extent that the woman’s wait for the benefit is short and to the extent that she trusts him to keep his promise.