<human>: Provide a brief overview of the text.

Hey, so I have a weird question that I have wondered about for a while, wanted to get your guys' thoughts. So my girlfriend and I have been dating for 5 years now. I am 22 and she is 21. When we firsts started dating, I was 17 and she was 16, we sometimes would send each other dirty pictures, I'm not going to go into details but you get the idea. I still have all of the pictures that she has sent me over the years, just never have deleted them, idk why. But my question is this: the pictures that she sent me from when she was underage, are they considered child pornography since she wasn't of legal age, if I still have them now? I mean I was underage at the time too, and it's not like I am going to distribute them or anything like that, I don't even look at them any more, I was just going through my phone today and saw them and thought to myself I wonder if I could get into trouble for having them since they are of someone who was 16 at the time that they were taken. I'm not some creepy person, I'm a normal, loving boyfriend and we have a good healthy relationship, I have just been curious about this for some time now. I suppose I should probably delete the ones from when we first stared dating, and I probably will just to be safe, but I just wanted to ask you guys what your thoughts were, just seemed like an interesting question. Since they were taken when we were both under 18, and since she willingly took them it seems like it shouldn't be illegal to possess them, but I'm sure there is some law that says differently.
<bot>: My girlfriend sent me nude photos when she was 16 and I was 17 and now 5 years later we are still together and I still have the photos, is this considered illegal for me to still possess these photos?