'Obsessing' over your pubes and how 'tidy and shaven they are' is no worse than obsessing over other people doing things differently to them. 
Why be so bothered about what other women do?
And shock horror, SOME women have a shaven minge because they want it like that, they enjoy sex more like that, and they don't give a shit what anyone else thinks!
And I agree that anyone who thinks a grown women with a shaved minge looks like a child, needs serious help. Why not mind your own damn business @hellbells35 If you prefer to go around with hairy bush down there, then go ahead........ but some people prefer not to.
No-one is pressured into it, and it's fuckall to do with porn. Grow up.
It is also horrible when you're on your period. Ewwwwww.
I do find it very hard to believe that midwives would have been discussing a new mother's big bush of pubes though. I don't believe that.
And so what if a full minge is 'natural' - so are a lot of things, but we alter them! Eg, we dye our hair, shave our legs, shave our armpits, whiten our teeth, pierce parts of our body, put indelible ink on it, (tattoos,)put on a bra to make our tits look firmer and higher up, wear make up to make ourselves look like we have smoother skin/less blemishes and zits, and larger eyes etc...
I can guarantee 100% that EVERY WOMAN who is finger-wagging, and judging, and commenting on other women shaving their pubes, wears make up and jewellery, and wears a bra, or has piercings or tattoos, or dyes their hair........... Anyone who says that they don't. I don't believe you. Not for a second. Typical mumsnet double standards! 