Maya i am lucky to have older boys who have been parented the same so people don't question me very much if they know me well and my children because the 'proof is in the pudding' my older kids are respectful, happy, responsible and helpful, if i am asked i often say because it works! i think people regret questioning my breastfeeding, co-sleeping, gentle parenting because i have my older two that are just little (well maybe not so little now) darlings! I have said once "your critisism is appreciated, f**k you very much!"
We have to very secured and assertive when it comes to how we parent and i find not many people will question your parenting if you answer with "Of course i still breastfeed" or "of course we still co-sleep", regarding the cutting hair, maybe you could suggest a mohawk for them if they believe it's their business if you cut your child's hair maybe they are looking for your suggestions for them! Looking at them like they are joking helps too, like they are the crazy ones for not knowing it and then saying something like - "oh you were serious". None of my boys had their hair cut until they were 3 years old, i love the silky baby hair, delicious! as for them talking about it being time for another baby, tell them you didn't know it was any of their business but will book front row seats in your bedroom when the time is right so they can 'really' get involved! how rude, i did tell an aunt after i had josh, he was about 1 that i was actually infertile and couldn't have anymore kids and thanks for bringing it up, no-one ever mentioned more kids after that, and then we had Zak and oscar in our own time!
love beckles xx