Cyber cheating? Is there such a thing?

I personally believe that when a man/woman flirts, has virtual sex, sends messages back and forth with a person of the opposite sex who is NOT their significant other, this is cheating. Don't you agree? If they are not happy in their relationships', then why not tell their significant other, rather than go and get "what they aren't getting at home" from a cyber relationship. To me, this is no different than going to a bar and picking up the first person that will show any attention. This is just wrong on many levels, but most of all, it's just morally wrong. When you are with someone, either married, long term relationship, whatever, this behavior is wrong. You have now put doubt in the other's head. "Can I trust him/her?", "is he/she cheating with an actual person?". Now, how can you expect this person to ever be able to look at you the same without thinking that you are thinking about someone else. If you are that unhappy with your current marital status, then either work on it with your spouse or move on the the one that's getting your undivided attention. Most of the time, the only one who knows that you are unhappy is you. If you are not open with your spouse, then, you are just hiding something. If it bothered you that much that you just had to go elsewhere for the attention, you are just an attention whore or you just have no morals. You pick.