Nudes

I found some nudes on my bf’s phone in the deleted section and I asked him who’s they were. They were his ex girlfriend’s from two years ago. We’ve been dating for a year. He said used them to send to some random guy that asked him for nudes. Then later he also told me he used them for master bating to since it was different than porn and since I don’t feel comfortable sending them personally. He told me that he’s not attracted to her still and it’s just something different than porn. He said it’s just a body and a naked picture of a girl. I’m not sure what to do. It hurts my feelings and I think it’s just really weird. Is this normal?? I don’t know if I should break up with him or not because I love him and he has been apologizing and telling me he’s sorry and he’s stupid for doing that. But I don’t know what to think of it. Should I give him another chance and try to forget about it?