Should I be upset, or is his explanation correct? I was looking at the history on our family laptop...?

[Scrabble]

I was looking at the history on our family laptop. While on Internet Explorer, I clicked on the “File / Edit / View / Favorites / Tools / Help” toolbar bar (near the top of the upper left screen). I clicked on Tools, then clicked on Internet Options, then Browsing History, then clicked the browsing history settings box, which displayed the Temporary Internet Files and History Settings, then clicked the View Files button.

One of the internet addresses was for “singlesnet.com” with the date, time and everything shown. Does this mean someone using this computer actually went to / visited that site, or (as my husband says) could it have happened when an advertisement for that website came up on the home page (but he didn’t click on it) and that’s why it appeared in the Temporary Internet Files folder? What is going on here? There were also Internet Addresses for facebook, twitter and myspace, all of which he says he doesn’t have. We have a two year old in the house, so I know it wasn’t her on the computer. Help me understand this please.