Robert C. Roberts's suggestion that the conditions for laughter at humor (e.g. jokes) can best be captured with a notion of freshness, as opposed to surprise, is pursued. The relationship freshness has to setup and surprise is clarified, and the place of freshness within a larger system of structuring metaphors is alluded to. The question of whether freshness can also cover laughter at the nonhumorous (e.g. tickling) is then taken up, it being determined that such coverage is possible but uneven. (...) However, once the phenomenon of laughter in the absence of feelings of amusement or similarly pleasant psychological states is considered, it is seen that freshness cannot underpin a comprehensive account of laughter. The notion of titillation is then proposed for this role. (shrink)