I've struggled with Matthew 5:28 - in context with the rest of the chapter, Jesus is basically teaching us that even if we follow the 10 commandments to the 'T' - we ain't all that. We still are sinning, because I'm sure even Mother Teresa lusted, or was envious, or cried "you Fool!" from time to time.
But maybe you're right. My main point is the TO A WOMAN, cheating is becoming emotionally attached to another person, regardless of a sex act. To God (not that I would try to speak for Him), it's got to be no good from any angle.
Heck, now that I'm a Dad of a daughter, I can't even go to a Hooters anymore; I can't NOT look at the girls as somebody's daughters. Kind of ruins the effect. Slowly, surely, God is doing his work in me, and one day I'll be totally rid of the wretched weakness. But I ai'nt there yet.
My main point was to let women know that men do compartmentalize, and that their men have no intention of running away with Jenna Jameson, they don't love her, they probably don't even like her. But they WILL look at her. Still a sin, just a different sin.