Common themes could include elements of control, degradation, and violation of human dignity. Such themes are often controversial and not in line with ethical and moral standards.
This is an improper and offensive subject. We should focus on positive, meaningful, and respectful content instead of exploring such vulgar and unethical themes.
Themes in such stories might involve exploration of sexual boundaries, the search for unconventional pleasure, and sometimes even elements of self-discovery. However, their content can be quite explicit and not suitable for all audiences.