I agree, friendships with the opposite sex are great...as long as your significant other is aware of them. A genuine friend of the opposite sex is one who is like any of your same sex friends, not one you share "sex talk" or "cyber sex" with.

My husband never actually met his first "cyber fling", she lived across the country, but what started at friendly emails, turned to sexually explicit emails, which led to frequent phone calls (that he went to great lengths to hide!) and a months long "relationship". I will never forget what I read in one of the emails I discovered, he had shared some of the sexual fantasies I had thought were "ours" with her, and even more hurtful, he called her "Sweetheart" (what he called me when we first met). Physical contact or not, I was betrayed and hurt. To me, by sharing his life with another woman in that way, he broke his wedding vows.