Me being a girl I can tell you we get curious, but me personally, I think it's rude and hella disrespectful to do that. I'd hate for someone to do it to me so I don't do it. I don't even like borrowing people's phones. I don't really have to worry about a guy going through my phone, though, since I don't have a bf, but I still lock my shit cuz my sister likes to take advantage when I'm in the shower or busy to call or go through my shit or sign me out of my shit like Myspace or Facebook. But I'd never go through a guy's or a bf's phone or comp. Whatever he does on his phone is his business, not mine. And if I were to ever suspect anything, I would just be straight-forward and ask, not do something as childish or immature as going through their phones or spying and all that bullshit.