Can anyone tell me something men do for us that we can't do for ourselves? Well, only two things: help make babies and sate our desire for  sex. That is the role of men in the world, as far as wommen are concerned. Any other thing you might want from a man, such as companionship, money, help around the house - you can do that yourself, or another woman can do that for you. Those aren't masculine roles but human roles. Thus, unless you want a baby or sex, you don't need a man.