The number "13," on the other hand, may refer to a specific episode or version of the anime series. It's possible that "Boku No Pico 720p 13" is a keyword used to search for a particular episode or compilation of the series that features Pico's adventures.
For over a decade, the title has been used as a classic internet "trap," where users recommend it to newcomers as a standard anime, only for the viewer to encounter explicit and controversial content. Internet Infamy: Boku No Pico 720p 13