Can iPhone 5s get virus or hacked by watching p. O. R. N?

I let my friend borrow my iPhone 5s for the weekend, and there's aalloott of p. O. R. N. In the history. It has ios 7.1 and I want to know if it can get a virus? I'm scared because I just got this pone, and I know that windows laptops get virusus like that easily, is there a way to avoid it? And I don't wanto to reset, please tell me As soon as possible, thanks.

One of the dangers of lending your phone to a 'friend' over a weekend is that they don't care what they download, or what lasting effects may appear.

Just wait for the monthly bill and you'll find out what else has been downloaded.

It would be really rare to get that on an iphone so I wouldn't worry about it.