I think it is a personal decision. I personally would not breastfeed that long. But, others might. The longest I breastfed was 9 months, and then my son bit me...and laughed...no more boob juice for him!
As far as the Dad bonding, there are other ways for them to bond with children then just feeding. Bedtime stories, playing, teaching, bathing, going to a park, etc. And for young babies, Mom can always pump a bottle to allow Dad to feed the child.
Food should never be considered a "comfort zone", no matter where it comes from.