Is it normal to send nudes with my ex?

My ex and I have been broken up for more than a year, but we can't seem to leave each other alone. Well, we do. We go months without talking and then every once in a while, we start talking again. The first time this happened, he found out that I'd sent nudes to someone else. So, that night, he messaged me to see if I was ok because it was unlike me (seemed a little jealous). I assured him that I wasn't pressured.

After that, we had a really deep conversation for about three hours. One thing led to another and we ended up sending naked pictures to each other. At the time, I thought maybe he liked me again, but he claimed he didn't. I was sad about this because I figured that if he wanted some nude pics, he could have just gone on Tinder or watched porno. I thought that because he had wanted them from me, that it was more personal. (I wasn't over him at the time)

Might I mention, our entire relationship was healthy when we dated. He ended up dumping me because he lost that special feeling, which tore me apart because I didn't do anything to deserve it.

After we moved on from the first sexting incident, and I felt heartbroken yet again (lasted a couple weeks). We stopped talking. But a few months later, the same sort of thing happened one night. The next day, he told me he regretted it. But then, he decided one last time couldn't hurt, so we did it again.

During our sexting, words were exchanged about how we desired each other. Yet, we always played it off as being young and horny. We both still swear we have moved on. But I don't know. Is it normal for two people who have supposedly "moved on" to be having such communications?
Do you think we have both moved on and are just lonely/horny or do you think we are in love and in denial?