I had someone once tell me that online relationships were “harmless fun” and as long as it stayed online, they didn’t effect his marriage in the least. 

I think I’ve just found proof that he’s wrong.  You see, a married couple was looking for love online since their marriage had gone south, only to discover that their new online lovers were each other!  You can read what happened here.

So, sometimes it isn’t Credit Card issues that break up marriages :)