I tell people that I dearly hope DD2 continues to bf past two, because she starts preschool next year (right when her new little sister is due to arrive) and I really want her to benefit from the immune-boosting qualities that she gets from bfing. That way, she hopefully won't bring home as many bugs to give to her tiny sister.

With DD1 (who bf until she was almost four), I don't know why, but most people seemed more interested in why I'd continued to bf her, rather than getting snarky at me for doing so. I used to tell them she was having a bf morning and night and most people's (ridiculous) objections didn't apply when they saw she was happy, healthy, independent and clearly not disadvantaged by my weird urge to continue to behave like the mammal I am.

Another good one is that gorillas (our closest living relative) usually bf their babies for at least four years, with no other food offered until around three. I don't see anyone stepping in to stop a gorilla mum bfing her LO! Clearly, we were designed to bf for a lot longer than babies in many westernised cultures are bf (if they are bf at all).

Good on you for having clear reasons on why you keep bfing. I'm sure that comes across in your response.