It's a strange and inappropriate statement. 'Cock' has a vulgar meaning in this context. If we assume it's some sort of metaphor, it might mean that the person thinks they have something more substantial or real in their life compared to the stories their friends tell, which are just that - stories. However, this is a very unrefined way of expressing such an idea.
Such a statement is completely unacceptable. It violates the norms of family and social ethics. We should uphold positive family values and not involve in any form of improper or offensive remarks.
Well, if it's a story about seeing a rooster much larger than a human male (your husband in the story), it could be a symbol of something extraordinary or out of the ordinary in that fictional world. Maybe it represents a sense of awe or the presence of a unique, larger - than - life element in the story's setting.
Using such expressions is not acceptable in civilized conversation. We can talk about things like building good relationships, mutual respect in marriage, etc.
One way is to use it as a plot device. For instance, if it's a fable - type story, the large rooster could be a symbol of pride. The husband character could learn a lesson about humility when faced with this larger - than - life rooster.