Quoting spidey_girl:" We all have parental blocks on our computers so I am not sure how they got the video of an old man taking his clothes off. Even the ipod and ipads have blocks on them."
Hunh, well, she's obviously really curious.
My mom never discussed sex with me, at all, and so I was never comfortable asking her anything. I didn't want to bring it up. Now that your dd is starting to learn about that stuff in school, maybe you should have regular little chats to talk about sex and stuff, so that she knows it doesn't have to be all taboo and something she can only find out about by sneaking around the internet at 4am.