WHY IS IT IS ONLY WOMENS WORK

Why is it that the house work is only women's work? Why is it that all we do is clean, clean, clean, then cook and then cook some more? Why can't a man run the vacuum once in a while? Why can't they take out the trash everyday? Why must the house be only the woman's place to keep and the men have all the fun of being out in the world everyday? Now I know that if as a woman you don't have a "JOB" you should do the house work. That I understand especially if your man works hard but when they don't work and she does why shouldn't the man do what the woman does when shes home all day? Fairs fair right? But then why shouldn't the man learn to pickup after himself and at least make an attempt to keep his home clean also. But some men just don't get it do they and they never will!