It never occurred to me.....the judge of a good butt is how a ball bounces off it. I remember this comparison before with Lady Gaga. Had to look up Miss Nicki's video and got confused because it looked like a stripper video. I wonder have the directors of these porn videos ever bothered to ask women if they enjoy what they're doing. The reason real women can't be found to participate in these Olympic sex acts is because its filmed in segments and they're acting. We would also rather get real facials in a salon and not during sex. My frustration isn't at you Tim but at the porn industry and society in general. Its pretty sad that Rhianna feels she has to strip to sell music.