<Ol> <Li> "Birthday Cake"--1: 18 </Li> </Ol> <Li> "Birthday Cake"--1: 18 </Li> <Dl> <Dt> Recording </Dt> </Dl> <Ul> <Li> Recorded at Radisson Blu Royal Hotel, Room 1306, Copenhagen, Denmark . </Li> </Ul>

What does cake mean in rihanna's song