No. In general, a straight guy is attracted to the opposite sex, and such a situation goes against the common understanding of a straight sexual orientation.
No. I've not come across this as a well - known story in general literature or common knowledge. It seems to be something very specific or perhaps a very local anecdote.
If 'cock' is a new sport, like a made - up extreme sport. He might face the challenge of fear. For example, if it involves high heights or fast speeds. He's used to more traditional sports, so his body and mind need to adjust to the new demands. Also, there could be a social challenge. His friends might not be into this new sport, so he might feel a bit alone in his pursuit at first.
Definitely not normal. Normal social interactions do not include sharing erotic stories. It shows a lack of respect for boundaries and proper social norms. It can also make the person on the receiving end feel harassed or uncomfortable.
You should firmly distance yourself from this situation. Reading or being exposed to someone's erotic stories is inappropriate and can make you uncomfortable. Politely tell him that this is not acceptable behavior.
No. Such a story involves inappropriate and unethical behavior. In society, we uphold values that promote healthy, consensual and respectful relationships, and this kind of description goes against these basic values.