First, we should be aware of the inappropriateness of such language. We can set self - censorship in our minds, and when we think of such words, immediately stop ourselves from using them.
First, focus on positive themes such as friendship or adventure. For example, you can start with two friends who go on a journey to discover a hidden treasure. Then, describe their challenges and how they overcome them using their wits and courage.
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.