I have a fable for chocolate cake.
have a fable for
idiomTo have a weakness for.
Origin
disputed originFrom the French "avoir un faible pour". Faible is cognate with foible and feeble.
Even though I am trying to eat healthy, I have a fable for salty snacks late at night.
Despite his reputation for strict discipline, he admitted that he had a fable for old, dusty books found in forgotten corners of the library.