SO watching porn on your phone

Does anyone else feel it's disrespectful for your SO to watch porn on your phone and leave it there? I've told him before that the least he can do is exit out of the pages so that I don't have to see it when I go to use my phone. For a couple months he didn't have a phone so I got it that he had no phone but he also knows that I'm not comfortable with hm watching it and feel disrespected when it's on my phone. He's got his own phone this morning and as soon as I picked up my phone it was just there and immediately just made me feel shitty.