There are no such inappropriate 'Straight Shota' stories in the official Dragon Ball Z canon. Dragon Ball Z mainly focuses on epic battles, power-ups, and the adventures of Goku and his friends to protect the Earth from various villains.
Dragon Ball Z is both anime and manga. The anime was adapted from the manga and they share the same story and characters, but presented in different mediums.
The combination of two beloved series. 'Naruto' and 'Dragon Ball Z' have huge fan bases on their own. When you mix them in fanfiction, it creates a whole new world of possibilities. Fans get to see their favorite characters interact in ways that the original creators never intended. For example, seeing Goku and Naruto team up in a fight is something that many fans have always wanted to see.
The appeal of 'Dragon Ball Z Kakavege Fanfiction' lies in the fact that fans get to explore the relationship between Goku and Vegeta further. These two are such iconic characters, and in fanfiction, their bond can be developed in countless ways that the original series might not have fully explored.
The character of Cooler is quite interesting. He's a powerful villain with a complex personality. Fanfictions allow writers to explore different aspects of him that weren't fully shown in the original series.
One alternative is to focus on character backstories. You could write about the early days of Piccolo, how he came to be the way he is. Another option is to do crossovers with other non - sexual universes. Maybe a story where the Dragon Ball Z characters meet characters from a magical anime world and they have to work together to solve a problem. Also, you can write about the relationships between the characters in a platonic way, like the deepening of the friendship between Gohan and Krillin.