It's a very specific human experience, having to learn how to take care of your child's hair because most people of your culture & ethnicity don't have hair like that and so don't know what to do with it.
It's not rare though. Normal people love who they love & partner up with people across race/culture/ethnicity all the freaking time. So out there in the world, a lot of people have some version of the experience I'm getting a glimpse into.