Food.

"I have a problem."
"What kind of problem?"
"I can't think of a food I dislike."
"... I can't imagine why that could be a problem."

" But think about it. I could go around saying "There is no food I do not like." Then someone might take it upon themselves to force food on me to try and find something I wouldn't like."
"Don't you think you might be over thinking this?"
"No."