it should be put under a big bomb and blown up forever.

Cheating is the saddest thing ever... I can't even watch it in movies with out getting up set, so this is a hard question for me to ponder. Not because I'm worried of it happening to me, but because I don't even know why anyone would even consider cheating, its so sad and devastating.
I guess out of the choices given I would have to go with the Risk taking over the rest, that's the only one that would make any since, Because the rest of the choices you would thing that if some one was attracted to some one else, they would call off the relationship and be honest before stabbing in the back.  and Opportunity seems like if you were having other feelings, you would either try harder to pull your loved one into your life or call it off cleanly and start anew. Then with sexual desire, that's where communication would have to play its role, and you would talk about it to figure out what is best for yall to move forward. Then with love styles, that isn't an excuse to cheat, do you love the person, yes or no? Now act upon your answer... yes or no? If there is a relationship problem, cheating is going to make it worse, put more bodies in your closet and make you feel worse than you already do, so you either need to fix what ever is wrong or move on. And finally a sense of  Entitlement doesn't even exist. You have no more right over your partner, than he/she has over you. if you are in a relationship, than you are equal. If you think you have a right over your lover, you are no better than a slave owner. Who sleeps around with his wife and property. And if you believe that's alright, go hang your self or become a monk because you don't deserve love from any human.

All righty, sorry for my little bashful rant, now on to why I think the risk factor is the only possible reason cheating should happen.

Some people love walking on the line, a close family friend of mine used to cut her self to see how many times she could do it to hurt those around her and to see how long her close friend would keep it a secret. It was so dumb, but as she explained it, it was exciting and made her feel  alive(adrenaline junky), and once she got caught she would start hiding objects, going farther than she should with guys, try drugs, all because she liked to keep secrets she said, it made her feel powerful and like she was walking on the edge. So that's sort of like cheating and I think that some people think they are the ones in control when they hold the power of there actions, choices and secrets.

Its sad really though, there are so many other ways to be in control and to hold power. And cheating is massively wrong... it should be put under a big bomb and blown up forever. :) then every thing would be much nicer.