Cheating is one of the worst crime a man can do. Because is mostly a pre-meditated one. Those who commit pre-meditated crimes are more dangerous and usually cruel. Undoubtedly, selfish.

Men cheat on their spouses and expect the spouses to be totally honest to them.  How unjust is this?
When one cheats on his spouse, he should realise his partner(cheating) else is cheating on her spouse as well.

So, as long as you are not a just person ,you can not expect the universe to be just.