Hi Robh,
I imagine it's for the same reason as why there are millions of ads on TV aimed solely at girls/ladies for underwear/clothes/make-up/diets/pills/magazines etc etc ....
Plus I'll bet a pound to a penny that all you guys wives or girlfriends will know exactly who Brad Pitt went out with before Angelina, and all the latest media gossip. While we generally neither know nor care. You know it's true
Guys and gals just have different interests - women usually like all the stuff mentioned above - and toys are usually for blokes.
It's been pointed out, slightly tongue in cheek I hope, that... "boys will be boys, but girls will be women"
In keeping with these definitions, my mum, wife and two daughters subscribe fully to all of the above accusations, - whilst I'm an unashamed toy collector.
And I think my habit is cheaper by the way - much