Before I had DD I was under the impression that I would be winding down or even stopping breastfeeding at 6 months.
This is because all the breastfeeding information says that you should breastfeed for 6 months. I didn't consider what babies drank after 6 months - maybe I thought they moved straight onto gin and tonics 
It didn't occur to me that after 6 months the choice would still be bottles of formula or breastfeeding!
So really it's BF for a year unless you switch to formula. I just didn't get this!
DD is seven months this week and I have just realised that I won't be stopping BF for a while to come - OMG I am going to be BF-ing a 4 year old before I know it!!