It's a little like casting out hundreds of fishing lines into the audience. You start getting little bites, then more, then you hook a few, then more. Then you can start reeling them in and that's a loveliest feeling - the whole audience laughing with you.
A further point is that, little by little, in the current universe, everything is slowly being named; nor does this have anything to do with the older Aristotelian universals in which the idea of a chair subsumes all its individual manifestations.