<human>: Can you summarize the given text in a few sentences?

Hi Reddit,

My SO and I've been dating for 4yrs and it's been great when living together. We had to start long distance (international) last summer and we both thought we'd be able to survive the gap, no doubt. I visited him last month and spent 5 blissful weeks together (in the physical arena: we got frisky, a lot). At the end of my visit, he teared up and said he realizes how precious our connection is. This is just to say he was really sincere when he said he loved me and that he wanted to stick with this situation until we can close the distance in a year or so. 
 

It's been about a month since we were together and while I'm embarrassed to admit it (I really am), I sometimes look at his search history. I found that he had searched for his city's backpages three days after my visit, and again last night. The two occasions were both just after we had said bye on Skype. For the first time, he also googled stuff like 'can you get arrested for escort services' and 'how to stop messages from appearing on iPad' (I have his iPad). The second time (yesterday) was just for the site. 
 

I'm lost. I totally understand he may need porn but aside from Backpages being illegal (I think?), is this acceptable? I don't know if he's actually gone through with anything, but just the possibility of him planning to disgusts me. This month is really busy for him work-wise, but now I'm terrified at what might happen when he actually has free time on his hands (our next visit is in the summer). He used to be such a sweetheart and I don't know how to reconcile this sketchy behavior.
 

What do I do? Do I even bring this up to him (at the risk of him using alternate ways of searching for this kind of stuff)? I was willing to try out LDR sex but now I feel confused, betrayed, and disgusted... Thanks in advance for any and all advice.
<bot>: My 4+yr SO and I have been doing long distance for the past 4-5 months. I found him googling backpages 2x this month. Should I be worried or is this normal guy behavior?