I guess in accepting that what may not embarrass one person ( whatever that is ) but may embarras another ...I'm in the minority here .....but when its deemed that anyone who feels like that about breastfeeding in public must be narrow minded , a prude, or worse still lewd , then I think that it is time for me to leave the thread to the moral majority .
I'm sure your husband is a lovely chap and is just a bit coy about seeing some breast. If he'd grown up in a culture which saw it as completely normal and natural and not something private and personal, to be hidden away, he'd be totally fine with it, whether he'd had his own kids or not.
It's not the quietly embarrassed ones we have a problem with, it is the narrow minded prudes who want it hidden away and complain to the woman, or the management, about it, and it is the ones who feel free to make lewd comments, as if they think the woman should remember that her breasts are merely sexual objects.