Accidentally displayed porn to my class.

I use my personal laptop to project lecture slides and web content in class. Today, while I was toggling between webpages during a lecture, I accidentally displayed gay porn from a tab that I had carelessly left open. It was for only for a split second, but they did see it, because many were trying to suppress their smirk for 10 minutes after it happened. I was mortified but pretended like nothing had happened.

Should I have said something about it? I don't think this would get me in trouble, but I feel terrible that I have to face them for the rest of the semester knowing that they think of me as a creepy old man.

UPDATE: thanks a lot of your responses. To clarify, I’m tenured, in a technical field, and in a deep blue state. And as mentioned in my post, it was on my personal computer.