First, if it's just a stupid joke among peers, you can have a conversation with those involved about appropriate language and respect. Tell them it's not okay to use such vulgar terms in relation to your son.
Well, perhaps it's a story about a wife who grew up in the city and then visited a countryside place where she saw a really big rooster for the first time. It could be that she was initially a bit scared or very intrigued. This encounter might have led to some comical situations, like she didn't know how to react around it or she tried to feed it but was a bit hesitant because of its large size. And it could also be a story that her family or friends love to tease her about later on.
Well, without more context, it's hard to say exactly. It could be that there is some sort of object or situation that has been misnamed or misrepresented as a 'huge cock'. Maybe your son has a large - sized item that someone is joking about in a very improper way. But we should always be cautious of using such vulgar language when referring to children.
This is rather inappropriate. However, if we consider it in a non - vulgar sense, perhaps in some fictional or symbolic stories, it could be a way to represent an over - exaggerated characteristic for the purpose of satire or to show an extreme in a character's physicality, but this is a very rare and odd concept in proper literature.
I'm not sure specifically which 'huge cock story' you are referring to. There could be many stories that might use this phrase in a non - vulgar way, like a story about a large rooster perhaps.