Apple’s Safari for Mac and Windows was one of the first browsers to have a private surfing mode, although Google Chrome has the best implementation of it to date. Apple never put a private browsing mode in Mobile Safari, possible because an iPhone/iPod Touch/iPad is intended to be a single user, personal device, hence not needing such a mode. But the truth is, iPod Touch and iPad are actually shared by family members way more than you think.
We’ll keep you updated.