Some stories might have the theme of a relationship milestone. It could be something that deepens the connection between two people in an intimate relationship. Also, there can be a theme of self - discovery, learning about one's own boundaries and desires in such an act.
A first time sucking story could be about a baby trying a pacifier for the first time. The baby might be a bit confused at first, not sure what this new thing in its mouth is. But then it discovers the soothing feeling of sucking on it and calms down.
No, it is not at all appropriate. We should uphold good moral values in our communication and avoid promoting or spreading any form of vulgar or improper content. Society has standards of decency, and this clearly goes against them.
Well, without proper details, it's difficult to determine what this 'cock sucking challenge story' entails. It could be a prank story, or perhaps some sort of made - up dare among friends that got turned into a story. But again, this is all speculation without more information.
They can make people realize the importance of communication in relationships. If someone is sharing a story about this, it shows that open communication about such intimate matters is crucial.
I don't know for sure as I'm not familiar with the story. It could potentially be a horror story if the mind control aspect is used in a menacing way and there are disturbing elements related to the other part of the title, but it could also be something else entirely.