I didn't have the impression that he is generally, I figured this was more a case of what you grow up with is normal - to the point that he didn't even pick up on it!
It's a version of the old (and, no longer accurate) joke: a mom knows her child's favorite foods, who their best friends and when their birthdays are, the names of their teachers, and their favorite crayon color. The farther knows some short people are living in the house.
Gender stereotypes. I can't speak for the 50's, but all of the young parents, regardless of sex, that I've personally known in the past 15 years have been hyper-involved in their kid's lives.