A woman's work is never done and now there's the data to prove it - in an unbelievably predictable survey result, 90 percent of women do more housework than men.
It also found our economy would be $1.5 billion better off if housework and childcare were shared more evenly by couples.
In the survey of 2400 Kiwis commissioned by Westpac, Men claimed on average they did 19 hours of housework a week while women said they did 28 hours.
Only 10 percent of couples who both worked full time went fifty-fifty on the housework and just seven percent of couples who worked the same number of hours did equal unpaid work.
"Women tend to multi-task so they're doing a lot of things simultaneously… men don't do that," explains public policy professor Marilyn Waring.
But what about the lawns and the BBQ?
"If there are more machines to play with, men tend to do more of the work, but I have noticed they prefer the leaf blower to the vacuum cleaner."
The survey says one of the main issues is men overestimate how much housework they do and underestimate how much their partners do.
But is it all men's fault? For decades society has been struggling to change the notion that housework is women's work and according to Westpac CEO David McClean, hindering that change is the raising of children.
"Women do most of the child-raising, often it's because they're already in a lower-paid job than the man so it's more economical sense for them to stay home... but what that means is their careers get disrupted and that increases the gender pay gap."
The survey was commissioned by Westpac in an effort to shrink the pay gap and boost the economy by $1.5b.
That boost would occur if those same women spent the time in paid work instead of on housework.
"This study is about how much more can we exploit women to get them to do more... because it's obvious that men aren't moving in what they are prepared to give," says Waring.