Wasn't sure where to put this...
Was looking for a cable today & checked in DHs laptop case, where I found an old notebook I'd lent him ages ago. I am in need of a small one for my handbag so I flicked through it to see if he was using it, to sneakily reclaim it 
Inside were various lists, one of places & the rest of girls names. There were pages labeled A-Z at the back, with loads of girls names on, I thought at first that it was sweet as it was probably when we were pregnant, names he liked etc. One of the lists was v exotic names, one of which I recognised as a porn star, I googled the others, they are also models/porn stars 
One of the other lists had the name of a local bar at the top, these names were clearly real names - surnames & first, some had middle too. Another was the same with some letters at the top.
I know I'm going to get flamed, but I googled the last 2 lists, they are all real names on Facebook. He isn't friends with any of them, & they are all quite young, many listing themselves as single mums. Most are attractive, but I can't see any connection between the second list except they are all from Bristol, which isn't that far from us, but DH has no connection to it whatsoever.
I'm really confused, I set up his Facebook account for him originally so know his password, but like I said, he isn't friends with any of them (I haven't logged into his a/c, I can tell from looking at his friends list).
I obviously don't know how old the list is, but the notebook has only been his 2 years max.
Do I confront him when he gets home? I found it innocently so am not scared of being accused of snooping, as I genuinely wasn't.
WWYD?