I (22f) just found out my dad (47m) has been using my laptop to look at porn and I do not know how to tell my parents

I (22f) literally have no idea how to handle this. My father literally has no filter when it comes to talking about anything. Mind you, I am home alone with him because my mother is away on a business trip, and he is pretty much in charge of my place right now. He moved in last week. I don't mind it as he's taking care of everything. But I just found out that he has been using my laptop to look at porn. He's been leaving his tab open and I found it. It's not like he's gonna kill someone in the porn, but it's literally just so weird. I have NO idea how to talk to him about it. Can someone give me some advice??<br> <br>Tldr; my dad has been using my laptop to watch porn and I don't know how to tell him that it's really weird.