People often ask me how it is that a Pakistani man does so much of this kind of so-called women's work and doesn't make a big fuss about it. The answer is one of my best jokes - the best thing about intercultural marriage is he has no idea that this is abnormal. Intercultural marriage means I get to say "Oh, YEAH! Fathers are ALWAYS in charge of bathtime!"
It goes both ways too. M also gets to make his own middle. In Pakistan he'd be expected to do all of the grocery shopping, home maintenance and running around town. Instead I pay water bills, get the oil changed in the cars, and arrange to have our gutters cleaned. (A student's schedule makes me the natural choice for the waiting-around-at-the-mechanic work.)
(Also, interestingly, it doesn't matter what the broader culture says about certain things, it only matters what the spouse's family says about certain things. So it doesn't matter if M readily knows that not all American dads are in charge of bathtimes, it only matters that men in MY family are in charge of bath times (false). Likewise, it doesn't matter that some women do their own grocery shopping in Pakistan, it only matter than in M's family, his father does all the grocery shopping. We all get our cultural norms from our own families. Or we fabricate them and then falsely attribute them to said families.)
Because we both chose this life - chose to make a life with someone who had an entirely different upbringing and background - I feel like we came with a little more of a blank slate. We got to forge ahead with the path that worked best for our little family. We make our own middle ground!