@TammySwanson
Literally billions of people have been parents, and everyone is surrounded by friends, family members, acquaintances, colleagues who are parents and so you see it first hand, hear them talk about it. Magazines, newspapers, books, blogs, websites, all forms of media are full of parents and parenting issues. You'd have to be an idiot to not to have some idea of what it's like.
@IcedPurple
I agree. This whole 'you can't possible have any clue what it's like unless you've been there yourself' attitude is nonsense. Like I said, seeing something (not just motherhood) from the outside isn't the same as going through it yourself but to say you can have 'no idea' is ridiculous.
Utter rot. What a load of nonsense! 
You can read as many baby books, and blogs and websites (about BABIES) as you like, and you can walk around mothercare as often as you like, and spend time with OTHER PEOPLES children as much as you like, and you WILL NOT have a clue what it is like to have kids yourself! It's insulting to everyone who has struggled to raise their kids with all the trials and tribulations and hardships and sacrifices that go with it!
People who think they know all about being a parent and think they have the right to comment on childrearing, when they have never had kids, really piss me off. No! You DON'T know what it's like, so stop trying to pretend you do. 
People who have children, have experience of having them - AND not having them, so their opinions and views are much more valid than the child-free brigade. Whether they like it or not.
And to be honest, it's the 'child free by CHOICE' brigade who are the most opinionated and annoying. The ones who want them, but haven't had any yet, don't seem to have the same arrogant attitude. However, I do get tired of the implication (from some) that women who have children are not allowed an opinion, in case it offends those without. People can't go treading on eggshells all their life.
And you can 'wow just wow' as much as you like at my post, and say you are glad I am not YOUR friend. I am as entitled to my views as the 'wow just wow' brigade, and I don't give a monkey's tit if you wouldn't want to be my friend.
As a few posters have said, I don't see why women have to automatically support OTHER women, purely because we have a vagina in common! So even if someone posts something I don't agree with at ALL, I am supposed to nod in agreement because she is also female? Do bore off....... 