Boyfriend watches porn in bed next to me while I'm asleep

I don't care if he watches porn any other time. But we don't live together and last night I slept over and was super tired and went to sleep before him while he was on Reddit on his phone. I rolled over and opened my eyes for a second and I swear i saw a naked girl I sleeply asked what he was looking at and he said nothing just Reddit. I thought I may have dreamt it but I checked his phone in the morning and I was right there all this porn on Reddit. We have a very healthy sex life. why does he have to watch it while I'm right there sleeping naked next to him? I'm not sure if I should confront him. I just feel kinda weird about it. What would you do?