Should I be uncomfortable?

So my boyfriend used to be like 100% all about me and he would jerk off to any booty pic, nude, etc. Of mine, and now when we shower, I’ve noticed that he’s been jerking off to porn. Should I be upset? Do I have a right to be upset? Like I can’t control him and I don’t want to really bring it up cause he’ll flip ( he doesn’t know I’ve seen him do it). But like i don’t want my man thinking of another woman, REGARDLESS if she is an adult film star like.... he wouldn’t like it is I did it to him? So I guess all I’m asking is, do I have a right to bring it up to him, and tell him it makes me uncomfortable? Or just suck it up and deal with it?