In my case, I was on medication that could have been harmful to baby if passed through breastmilk, so I could not breast feed. I am sure I am not alone in this.

I know another lady who was sexually abused as a child and found breastfeeding v traumatic as a result and could not do it. I was reading that about one in three girls will be victims of child sexual assult. The difficult thing is that if something like that has happened and as a result you can't breastfeed, its not something you want to tell people openly, so this poor woman found herself being judged for not breastfeeding and not being open as to why.

Hope this helps