Britney Spears and Rihanna sing about sex

Britney Spears teamed up with Rihanna for a remix of S & M seual content.
The single was released earlier this year by Rihanna, but in some countries was censured for his letter, because the name refers to sadomasochism.

Part of the song goes "sticks and stones may break my bones, but whips and chains excite me. "
In addition, the video of Rihanna also generated controversy because the material appeared tied, simulating sex with a doll, among other things, and the photographer David LaChapelle accused of plagiarism.
However, the weekend it emerged that Britney put her voice to a remix of the track.

Was Rihanna who announced in his twitter that he had worked with Spears, and she replied that she had liked the experience.