We people, can broadly be segmented into two categories. Those who cheat. And those who like to be cheated. Albeit my considerations for not generalizing this post, I very much would like to and hence I extend my apologies in advance.
I would like to put us, women, in the latter. However, I have begun to view things a little different lately which is why I have come to believe that it is not a man's fault when he cheats us...
You see, the poor man does only what he's so good at! I have a certain notion that a man's brain has a special segment that is dedicated to cheating - it is this part that he uses to devise flagrant ideas and come up with new ways to cheat his partner. And the women, those I like to refer to as 'the demented souls', have a strong liking for this trait in a man. It somehow seems to me that we are easily attracted to those with such faults and hence fall for all the crap that they offer.
Hence, it is OUR fault when we are cheated, OUR bad for not being able to see through the fake smiles and for being so daft to believe the horse-shit!