No, Bob round the corner is doing it.
Oh wait, of course I'm feeding my baby my-bloody-self.
I must've been asked this 4-5 times per week when my children were babies and was reminded today when someone asked my friend. She formula feeds and the inference behind the question is 'are you breastfeeding?' so technically her answer should be no but...really, AIBU to think it's a pretty stupid way to ask a personal and unnecessary question?