Rock has to absorb other rhythmic forms, because the underlying rhythm of music changes with fashion, and people like to move differently, and the underlying rhythms have to be the ones that people want to dance to.
Mick JaggerSamba rhythm is a great one to sing on, but it's also got some other suggestions in it, an undercurrent of being primitive - because it is a primitive African, South American, Afro-whatever-you-call-that rhythm. So to white people, it has a very sinister thing about it.
Mick Jagger