lol where you all get that information! Some try muscle relaxers before an anal scene, but is not "a lot of relaxers and pain killers" In porn, anal is not every single scene; is sometimes, and the girl can say yes or no, and a lot of them enjoy anal. Female pornstars are a different specie. Love them.
Well, I suppose if you already have a torn up O-ring, you don't need much of anything.