Should i confront my cousin about what i saw in his web browsing history!! :o?

I went to my cousin's house yesterday. And i used their family computer to check my mails. Then in the browsing history i saw: boobs pics, pics of some actress naked, and pics of girls showing their nipples! Really it was disgusting!! In my cousin's house only 3 people stay....my uncle, aunt and my cousin. My aunt doesnt even know how to operate computer and my cousin is only 11yrs old, he just plays games and checks his emails and uses google for school related project work. So only person left is my uncle. But he usually doesnt use computer much except for emails. And whenever i talk to my uncle, it keeps me reminding of that browsing history and i dont feel like talking to him! So should i ask my cousin about that browsing history or ignore it?