I think it has a lot to do with the way you and your partner see the parenting experience... A friend of mine went to all the appointments and scans and everything by herself, and her DH ended up being at the birth, and back at work a few days later... (not that I am judging!!!!). And I kind of see his parenting attitude as "I am the provider, and my DW is the nurturer..." I think he would have been someone to say "What do I need to know about breastfeeding for, I'm not doing it..." whereas maybe people who have really involved partners see the parenting experience as a joint experience, and to know what the other is going to go through and be able to support that to the best of your ability is important to a lot of people.