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- have a weakness for
have a weakness for
have a weakness for someone or something
Fig. to be unable to resist someone or something; to be (figuratively) powerless against someone or something. I have a weakness for chocolate. John has a weakness for Mary. I think he's in love.
have a weakness for
Be susceptible to; also, like or enjoy. For example, She has a weakness for older men, or Bill has a weakness for fine wine. [c. 1700]