id say it has to do with ones moral beliefs.
cheating on a lover should just not be done
when i was in school and cheating was there as a thought, like on a test, it scared me as wrong or i mite get caught. but then at home doing homework i could have cared less, id copy something out of an encyclopedia, copy someone elses work, i didnt care. i wasnt going to college or anything i just wanted to get it done. it wasnt against the law or anything.
something that always bothered me that i used to do is reset my stats on video games. games that i was really good at and always had good stats but my mind wasnt working properly for a period of time due to parents bothering me or whatever that shouldnt have affected my play to begin with. so id reset. it wasnt rite, i wasnt a professinal athlete that should be dealing with my surroundings anyway, but screw that its not messing with my golf game. so at the same time i felt it both wrong and just fine.