La vespa e la regina (1999)

Renato is a very effeminate gay man who is nicknamed "Marlene" in honor of Marlene Dietrich. Because of a promise he made to his sick grandmother, he must try the opposite sex at least once. He thinks he has a chance with Ginevra, the lesbian leader of the rock band "The Fucking Sisters". She has just found out that her girlfriend cheated on her with a man, so she decides to find out how it feels to have sex with a man.