Another option is a time - travel fantasy. For example, a character could travel back in time to ancient civilizations like the Maya or the Roman Empire. They could experience the culture, architecture, and daily life of those times, and perhaps even change the course of history in some small way.
I'm not entirely sure specifically what 'swallowing black nut stories' are as it's a rather unusual phrase. It could potentially be about the act of swallowing black nuts in a literal sense, like in some cultural or traditional practices related to consuming a type of black - colored nut. But without more context, it's hard to say for sure.
As far as I know, there are no mainstream, famous stories that are commonly known as 'swallowing black nut stories'. However, in some small, isolated communities, there might be local tales that we are not familiar with on a global scale. These could potentially be related to their unique cultural or environmental aspects, such as if black nuts are native to their area and have some significance in their local lore.
Rather than such inappropriate content, we can talk about first - time achievements in academic or sports. For example, the story of a student getting the first A in a difficult subject or an athlete winning the first medal.
To overcome nervousness when it comes to the first time swallowing cum, first, make sure you're in a comfortable and safe environment. This means you trust your partner completely. Build up your confidence by exploring other aspects of sexual intimacy first. Get used to the physical closeness and the overall sexual atmosphere. Also, focus on the positive aspects of the act within the context of your relationship, such as showing love and acceptance to your partner. But always remember that your feelings and boundaries are important, and if you're not ready, it's perfectly fine to wait.