A woman one loves rarely suffices for all our needs, so we deceive her with another whom we do not love.
— Marcel Proust

You know that the Tasmanians, who never committed adultery, are now extinct.
W. Somerset Maugham infidelity quote

Husbands are chiefly good lovers when they are betraying their wives.
— Marilyn Monroe

No lover, if he be of good faith, and sincere, will deny he would prefer to see his mistress dead than unfaithful.
— Marquis De Sade

Adultery is the application of democracy to love.
— infidelity quotation by H. L. Mencken