Well, Danny Phantom's first time facing a really powerful ghost could be an interesting story. Maybe it was that time he first encountered the Ghost King. He was probably really scared at first but then found his courage and used his powers in a new and creative way to fend off the threat.
One common experience is the nervousness. Both partners might be a bit jittery as it's a new and intimate situation. There could also be a sense of awkwardness in the beginning, like not knowing exactly what to do or how to move. Another common aspect is the emotional connection that deepens during this time.
One interesting story could be about Danny and Sam going on a ghost - hunting adventure together. They might discover a new type of ghost that has unique powers and they have to figure out how to defeat it using their combined skills.
There could also be a body swap between Danny and a ghost. The ghost, now in Danny's human form, experiences human emotions and sensations for the first time. Danny, in the ghost's form, discovers new areas of the Ghost Zone that were previously inaccessible to him. This swap leads to both learning more about each other's worlds.
Often, in these stories, the first experience is also accompanied by a lot of fumbling. It's not always as smooth as one might expect. There could be confusion about what to do next, and both partners may be learning about each other's bodies at the same time. There might also be a sense of discovery, like finding out what really pleases the other person.
Well, in one adventure, Danny first time faced a new type of ghost that could manipulate time. It was really tough for him as he had to constantly adjust his strategies while the ghost was changing the time flow around him.
Often, there's a lot of anticipation. Girls may have thought about this moment for a long time, perhaps influenced by media or friends' stories. Sometimes, the first time can be a bit uncomfortable physically due to inexperience, but with a patient and understanding partner, it can also be a time of discovery and learning about one's own body and desires.
One interesting Danny and Dani fanfiction could be about them teaming up to fight a new and powerful ghost. They use their combined powers and unique abilities to outwit the enemy. For example, Dani might use her speed while Danny uses his more powerful ghost ray.
One interesting story could be Danny's first encounter with a powerful ghost. He was probably really scared but managed to use his newfound powers in a creative way to fend it off. It showed his growth from an ordinary teen to a hero.
Another type of interesting fanfiction in the Danny Phantom universe might be those that delve into his relationships. It could be his friendship with Sam and Tucker taken to new levels. Maybe they go on an adventure together that tests their friendship in ways not seen in the original series. For instance, they might have to make a difficult choice between saving Danny's secret identity or saving the town from a new ghost threat.
For many straight guys, their first time camping can be really exciting. Sleeping under the stars, building a campfire, and cooking food outdoors are all new and fun experiences.