they masturbate! oh the horror!
I agree that if Sexual Fantasy was cheating I don't think any one would not excluded. It is natural to have dreams and some of them will included fantasies. The human mind has to be stimulated and that is one way to do it. It is all how you decide to act after the fantasy. Some fantasies are best left as that...a fantasy.
There are parts of us we keep buried, maybe not hidden per se, but locked away. For ourselves, for our own quiet time musings. I think any kind of fantasy can be like that. Maybe we don't share them, It's an inopportune time, we're embarrassed ... for whatever reason. For me, if a fantasy is actively pursued, without divulging, it can be a fine line. It seems a mark of dissonance if the sexual desires are so strong that the fantasies then become more real than the real.
Conversely, a fantasy now and again can see some of us through a period of confusion and conflict and often strengthen our resolve.
“Be who you are and say what you feel because those who mind don't matter and those who matter don't mind.” ~Dr. Seuss
Sexual fantasies for me are on the same line as any fantasy. I dream of a huge mansion with servants, doesn't mean I am not content enough with my home. I dream of fantasy trips to Italy and drinking wine while watching the sunset. Doesn't mean I cannot enjoy the simple sunset in my own backyard.
Fantasies are just that... fantasy. If we were to dissect every aspect of the mind and say that this or that is "not allowed" by social convention then the world as a whole would come to a distinct stop in the creative aspect. Where in the world do you think you get such amazing literature, music and movies?
Those who fear every little piece of distraction as cheating be it by a religious or moral reasoning are setting themselves up for not only lying in their own minds but being VERY disappointed by those around them.
I think fantasies awaken a part of us that we long for, that we desire. Maybe our partner is not into whatever out fantasy may be! I agree there is a fine line.......and it's actions vs. thoughts!