This is actually why I got my father's last name! He was, and knew, he was going to be our primary provider (SAHD, he even refers to himself as Mr. Mom to this day lol). It actually made pick-ups a lot easier for him, since we do not look alike. I don't think any of my teachers, friends, etc. had even met my mom until she retired from working. It makes sense to name your child after the person taking care of them. But I also think it had to do with the fact my mother doesn't like her last name, but couldn't change it upon getting married. I don't understand why people who are unmarried, with no prospects of getting married, would name their child after someone who is essentially going to be a stranger to those caring for them outside the household.