Do goofballs use only michief interactions in your game? Mine do all the time since latest patch. They don't use any other interaction, not even funny ones.
That's really interesting @Finvola. I wonder if there is a give-and-take between the Mischief skill and the Comedy skill? Like if comedy is higher they use funny interactions, if mischief is higher (as it is with my Cameron) they use mischief interactions, if neither then maybe it defaults to funny as in your experience?