There are many types of adult products that are hot and controversial on the Internet. Here are some of the main categories and why they are controversial: 1. **Sex toys**: - **Vibrators, smart sex toys**: With the development of technology, smart sex toys (such as vibrators that can be controlled by mobile phones) are becoming more and more popular. However, some people have expressed concerns about the privacy security and data protection of such products, worrying that personal usage data may be abused. - **BDSM equipment**: Including handcuffs, blindfolds, whips, etc. Such products are in high demand among specific groups, but in some cultural or religious contexts, BDSM-related products may be considered immoral or inappropriate for public discussion, leading to controversy. 2. **Adult content subscription services**: - **Online video platforms, live broadcast services**: Platforms that provide adult video content or live broadcast services are popular among young users, but they also face challenges in ethical concepts, especially in terms of protection of minors and content review. 3. **Virtual reality (VR) adult content**: - **VR adult videos**: With the development of virtual reality technology, VR adult videos are becoming increasingly popular, providing a more immersive experience. However, such products may raise concerns about the blurred boundaries between virtual and reality, as well as potential impacts on users' mental health. 4. **Personalized lingerie and sexy clothing**: - **Customized sexy lingerie, role-playing costumes**: These products are particularly popular among young consumers, but they may also cause controversy because they do not conform to traditional aesthetics or social norms, especially in more conservative regions. 5. **Sexual health and education products**: - **Sex education books, online courses**: Although they help to raise awareness of sexual health, in some regions, open discussion of sex education is still a sensitive topic and may be opposed or restricted. 6. **Privacy protection issues**: - **Anonymous purchase and delivery**: Although many adult products provide anonymous purchase and discreet delivery services to protect user privacy, there are still concerns that product packaging may be taken by mistake or disclosed, resulting in user privacy leaks. The popularity of these products reflects the increase in society's openness to sex and the growth of diversified needs. However, due to the influence of cultural, moral, legal and other factors, many adult products inevitably cause various controversies during the promotion and sales process.