"Schoolboy-se" appears to be a typographical error, and it seems you are trying to explain the meaning of the tag "school boy". A "school boy" is typically a young male teenager or young adult who attends school. In the context of porn video tags, this term often refers to content that involves individuals playing the role of students or teenagers in a school setting and may include themes such as student-teacher relationships, teenage curiosity, and other scenarios involving high school or college aged boys. It caters to those who enjoy the fantasy of engaging with younger characters in sexual situations.