Once upon a time, there was a beautiful princess.

And she met a frog.  She was horrified by it.  It was pretty awful after all.  And green.  But this frog was no Kermit.

One day, along came a big duck.  The frog was horrified.

Then, along came another frog.  It was green, like most frogs are.  It was slimy also.

The princess was twice as horrified as before.