<human>: Can you condense the text into three sentences or less?

What I found was: Diana Prince XXX. One snapchat video of her singing with her bare tits bouncing, and two photos of her, yet again, bare tits out. 

The problem: While I don't have any issues with my boyfriend watching porn, finding saved images/videos from a pornstar on snapchat is infuriating. I've watched porn alongside my significant other of three years, and I know that he wanks to it in his time alone. It doesn't bother me. But something about the source of content (snapchat) is disturbing to me, and what is even more disturbing is that he downloaded it to his phone. 

Our perspectives: My boyfriend doesn't see why saving these videos/photos from snapchat of a porn star is any different from downloading porn to his computer. In his defense, he says that it shouldn't matter because she's just a porn star, either way. But the way I see it, her videos/photos on snapchat are personal glimpses of her as a person. You see the same tits you see in her porn videos, but there's a personal side to it -- you can hear her voice when she's singing (not moaning), you can find out about her interests that aren't porn related (cosplay, for example), etc. etc. 

The big question: Why is this such a big problem for me? Am I overreacting? Or do I have reason to be upset? When I found these videos/photos, I was livid and wanted to end our relationship then and there. I asked my boyfriend why he had to save these things on his phone, and his response was: in case his computer was running slow or he didn't have access to the Internet. I found that both pathetic and extremely perverted -- the fact that he is so dependent on porn that he has a back up plan.
<bot>: Girlfriend is disturbed by boyfriend saving snapchat videos of a pornstar on his phone. This is almost a deal breaker for her. Is it reasonable for her to be so upset?