Of course, all the time! I mean I'm in a relationship with my laptop and I cheat on her with a computer in the library. But, most of the time, I have an excuse. I mean, my laptop doesn't have a printer and I do need to print things out. I feel very happy, though, because I have a baby that I can cheat on and she won't get mad... Well, as long as I don't do it too often.
When I first got married I was young. I had to fight many urges that any young guy experiences. Of course I loved my wife but I was battling these urges. It eventually chilled out and I have never cheated. But I can see how weak people can.