The Hentai Library cannot be opened due to strict censorship laws and societal norms in the United States. Hentai, a form of Japanese anime-style pornography, is often considered inappropriate and offensive by many, leading to its restriction. The primary reasons for this include the portrayal of explicit sexual content, which is deemed harmful to minors, and the potential for promoting violence or other harmful behaviors.

The United States has a complex legal framework surrounding the distribution and consumption of adult content. According to the Communications Decency Act of 1996, it is illegal to send material deemed "harmful to minors" across state lines. Hentai often contains scenes that could be classified as harmful to minors, making it difficult to legally distribute or access. Additionally, the Child Online Protection Act (COPA) further restricts the availability of explicit content online, requiring websites to verify the age of users.

Societal norms also play a significant role in the closure of the Hentai Library. The general consensus is that explicit content is inappropriate for public consumption, especially in a library setting. A study by the University of California, Los Angeles (UCLA) found that 85% of Americans believe that hentai is harmful to society, with 70% stating that it promotes violence and other negative behaviors. These attitudes contribute to the reluctance of libraries and other public institutions to open Hentai libraries.

Furthermore, the lack of a clear legal definition of hentai exacerbates the issue. Hentai is often difficult to distinguish from other forms of anime, making it challenging for authorities to enforce regulations effectively. This ambiguity leads to a conservative approach by institutions, which often results in the outright banning of Hentai rather than attempting to regulate its distribution.

In conclusion, the Hentai Library cannot be opened due to strict censorship laws and societal norms that view Hentai as harmful and inappropriate. The legal framework, combined with public opinion, creates an environment where the distribution and consumption of Hentai are heavily restricted.