Why does swimwear count as 'sexual content' on Apple's App Store?

(From Guardian Unlimited)

Why is Apple pulling blue.. er, porn.. er, "adult" content from its App Store? Is it to cleanse it ahead of the launch of the larger-screen iPad? Is it a sudden fit of blue-stockinged horror at the sight of what Gok Wan would term ladies' "bangers" ?

Apple announced the change (to developers) in an email last Friday: "We have decided to remove any overtly sexual content from the App Store, which includes your application," the letter from the iPhone App Review department reads. "Thank you for your understanding in this matter. If you believe you can make the necessary changes so that [app name] complies with our recent changes, we encourage you to do so and resubmit for review."

Why? Why why why? And what is "overtly sexual"? …