[vidarh]

> One reason why I think this occurs is that there is no concept of a 'message' in OOP, only methods or functions of a class. There's explicit coupling even when calling a method with no arguments because you know the method is valid for that object.

This is specific to early-binding languages like C++, Java etc. Look at Smalltalk or Ruby, and this is not true in the general case. E.g. Ruby ORM's tend to dynamically create classes and methods at runtime based on analyzing the database schema of the database you connect to. You literally won't know if a given method exists until you've connected to the database. Even then, there are no guarantees - depending on framework it may e.g. let your call hit "method_missing" first time (or every time) and optionally then define a method (or it may continue to handle it via method_missing, but defining a method can be much faster, depending on situation)

> My approach simply broadcasts the message and lets the objects determine how to handle it themselves.

So OOP the way Alan Kay describes it, in other words.