A prestigious school can't let its students have sex willy-nilly. That'd be irresponsible. Instead, it'll provide them with pre-approved, school-sanctioned gigolos.
(Source: Irodori Comics)
Note: Originally self-published under the name "Seika Jogakuin Koutoubu Kounin Sao Oji-san (聖華女学院高等部公認竿おじさん)".