Use "fertile imagination" in a sentence

1. For once, the artist's fertile imagination failed him.

2. These deformed monsters existed only in men’s fertile imagination.

3. He is said to have been convivial, widely knowledgeable, with a fertile imagination and a whimsical sense of humour.

4. Such anxiety begins when you start to agonize over an endless number of hypothetical situations, many of which may be the product of a fertile imagination.