I've been living in France for 16 years and eaten a lot of petits fours. Today I learned that they can be sweet? I've never seen somebody use the term for sweet foot.
I live in Australia and I only ever see petits fours used to describe small sweet morsels served at the end of fine dining (a three course meal, a tasting menu or degustation) often delivered with your order of coffee or tea.
https://www.google.com/search?q=dinner+course+menu+petits+fo...