I certainly do have objections to exposure of the female body to sell
whatever.  I have no problem with showing exposed breasts in a breastfeeding
class for adults.  However, in addition to my strong beliefs regarding
modesty (which includes things like skirt lengths as well as breast
exposure), I feel that we can "turn people off" to breastfeeding by making
them feel that in order to breastfeed, they need to expose themselves in a
way that makes them (and perhaps their husbands) uncomfortable.  When I show
exposed breasts in breastfeeding classes, I also make sure to show ways in
which women can breastfeed discreetly in public.  Bonnie