There is a lot of old bollocks posted in this thread, and even some of the stuff which may be true is completely irrelevant.
My feeling has always been that whoever does more paid hours of work in the couple will logically do less unpaid hours. If one of you is doing 40hr pw and the other 10hr pw, guess who's doing the dishes tonight?
Of course it's always hard to add up exactly. If I'm on this forum for 30 minutes while my son watches tv, does that count as "childcare"? A babysitter would count it in their hours, so why not? But it's not very hard work. What about cooking dinner and doing the dishes, don't single people living alone have to do that, too? So do we count the 30 minutes you would have spent doing that anyway, or only count the extra 10 minutes? Etc. But anyway, broadly speaking, however the paid work is spread out, the unpaid work should be spread proportionately to balance things out. With the caveat that sometimes we need a break - kids are tiring.
My wife works full-time in an office, I work part-time from home, about 15hr of training people then another few hours of admin and marketing stuff. Our 3yo son goes to childcare tue/wed/thu, I'm alone with him mon/fri, we're all together sat/sun. She does 2/3 of the paid work hours between us, so I do 2/3 of the housework, or maybe a bit more.
If anyone feels this impacts my masculinity, they can go fuck themselves. I hunted deer as a kid, was in the Army a decade, I lift weights (as does my wife), I can do well in whatever "masculine" pissing contest you want to come up with. That is all crap, the most manly thing a man can do is be a good husband and father. Each couple has to work it out between them with no assumptions exactly how the domestic work is shared out. But I will note: no man has ever been murdered by his wife while he was doing the vacuuming.
My son will grow up seeing his mother lift weights, fix things around the house and hold down an intellectually challenging job - he'll respect women. And he'll learn to clean and cook, as well as lift weights himself. So as a young man he'll be strong, fit, respect women and be able to clean and cook. Girls will be falling at his feet!