(abbreviated as BMM) Music that gets you in the mood for sexy time. There is no defining characteristic of BMM, it is completely subjective and dependant on each person's musical preferences.
Girl 1: My boyfriend is so weird, he gets turned on whenever Britney Spears starts playing haha
Girl 2: Easy for you to say, my boyfriend gets mad hard whenever I play the soviet union national anthem. He says it is his preferred Baby Making Music.
Girl 1: I hate it here.