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.
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.
Some people might feel a bit shocked or surprised at first. It's a very new and different experience. There could be a sense of closeness to their partner as well, as it is an extremely intimate act. However, everyone's reaction can vary greatly depending on their personal beliefs, relationship with their partner, and how comfortable they are with such an act.