Boyfriend's Porn Search

I posted this in another group and didn't get a response. I just want people's opinions, advice, etc.

I looked at my boyfriend's phone earlier this morning and found he had been watching porn with transgender women. The category that popped up in the history was shemale. After he woke up all he said was he doesn't remember doing it and hasn't said anything to me since. I don't care about the porn, I'm just really confused on why he would be watching this. If you aren't familiar with it, the women are still anatomically men.

I'm not looking for hateful comments about him or about me looking at his phone. He's not a bad person and what works for us, may not work for you. Just trying to get an outsiders opinion.