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[Sweeping generalisations ahead]
Firstly women are a lot more sensative about their enviroment (they have a lower tollerance for mess and tend to get more obsessive about interior decorating), and so tend to be more prone to nag and micromanage things around the house.
Secondly women make a lot of decisions about relationships which men never consider. They activly evaluate the relationship, discuss it with their friends, and when the relationship gets rough start doing little 'relationship tests'. Men don't do these things.
And finally women are more prone than men to adopt a passive agressive stance, which always comes across as manipulative and controlling.
Not saying all women are like this, or even that there arnt men who act that way, but it is a well established stereotype, and one which does hold up to examination.2