Gender neutral? (photo heavy!)

When I had Aesop, I dressed him in whatever clothes we were given. I was young, we didn't have much money, and I was only really getting into my sewing groove. He wore a lot of overalls and t-shirts with slogans like 'I can dig it' (with a digger underneath, of course).

Otto was a bit different. Four and a half years later, and I decided I was going to dress him however I wanted and that was that. He wore a lot of bright colours, a lot of woollens.. the majority of his clothing was what I would consider to be 'gender neutral'.

Then along came Mollie.
|Since we didn't find out what we were expecting, I sorted the clothes into three piles: girl, boy and gender neutral. I was surprised to find I put nearly everything into the last pile. Everyone said I would change my mind if I had a girl, and give in to the pink.
I must say, Mollie does wear a little bit of pink. I think it's a combination of that being the colour of a lot of the hand me downs, and of me wanting to girl-ify her less 'girly' outfits. (Which is something I didn;'t expect myself to want to do - I was surprised I felt the need!)
But, honestly, she mostly wears blue. It suits her. It is the colour of her eyes, afterall.
 

Where am I going with this?
I guess, I'm wondering why on earth we consider colours to belong to one gender or the other. Why society expects little girls to wear pink, and boys to don blue. (Actually, I've read enough to know how it came about, I just wonder why it still applies in this day and age..)
I've had so many people comment on how Mollie doesn't wear enough pink. 'Ohh she's looking a bit boyish today!', 'You know, you will have to invest in some pink clothes for her!' (from my plunket nurse?!) and 'Mollie, you just come and see me if your Mum doesn't buy you enough pink, okay?'.
What confuses me even more, is that none of these women are wearing pink themselves. They are wearing jeans and t-shirts, or shades of black, brown, blue and red. They are dressing in more 'manly' colours than they are telling me not to put Mollie in! Pah!

I started this post with a purpose, and I seem to have lost it a little. I seem to have ended up just having a little bit of a rant. But that's okay, right? I think my main point is this: assigning colours to gender is ridiculous. So, while we probably can't escape the idea completely, I will be dressing my girl in blue, tractor covered onesies one day, and a frilly pink dress the next (and putting Otto in unicorn t-shirts) for as long as I possibly can.. and no comments from 'well-meaning' others is going to change it.