Females cheat far more often. Fortunately, most women manage to keep it a secret due to their secret keeping and nature of friendships. On the other hand, when males cheat, they usually get found out. (Although, I don't have any results at hand, we could utilize the Female vs Male investment bankers and how much they cheated on their spouse. Google for the results).
it depends on the individual and how much they actually love u. if they really loved u then they shouldn't cheat.
I think what you said is right, but I don't think its more. I think its equal, its just that when females do it, its more on the down low unlike when men do it.
If you wanted the whole world's statistics, it's very likely that males cheat more than females because there are still cultures out there that treat women as a lower form of life.. middle east, india and even some parts of china still do. The only reason you'd ignore their stats is because in their culture a guy seeing several women (or having several wives) is normal. There's actually a lot of good men out there, but unfortunately I feel the world is still for them.