I'm sorry, I'm not very familiar with the specific 'Corazon Salvaje' from 1993 in great detail. It might be a telenovela or a story. Generally, it could be about love, passion, and the human heart's wildness (as 'corazon salvaje' means 'wild heart' in Spanish).
The idea of sex cartoons involving horses raises serious ethical and moral issues. It goes against societal norms and values, and can have negative impacts on mental health and the perception of appropriate behavior.
Naruto sex Kushina comics are not something to be explored as they go against the intended themes and values of the Naruto franchise. They are likely unethical and might even be illegal in some contexts.
Overall, the anime of 'Mikakunin de Shinkoukei' is a faithful representation of the manga. Some changes might be made for better animation or pacing, but they don't significantly deviate from the core of the manga.