Planet CakePHP

Can somebody perhaps explain here why on earth CakePHP has a convention of using plural names for db tables and controllers and singular for models? Why not always use singular terms, or always plural? For me it seems confusing to always have to think "now do I use plural or singular here?" (Or is there an easy way to remember??) And then you have the join-tables that use a combination of both!

I assume there's a good reason somewhere, but just have not come across it.

(I really hope it's not just because Ruby-on-Rails works that way.)

Simon.