Can we say gross! My bet is that you reaally want to have sexual fantasies about other people, but don't want to feel too bad about it, so you include your wife. I say it's wrong because you're still having sexual fantasies about other people. Also, you might want to beware about your fantasies, people who cheat on their spouses just don't wake up one day and say " hey i think I'm gonna cheat today" Everything starts from somewhere!