I've been looking after a set of boy-girl twins for four years now, at this stage I'm more like an auntie than a nanny and I always do something special with them at Christmas.
The girl twin has just developed a thing for ballet, this is something we've been bonding over and I want to take her to see the Nutcracker as her Xmas present, I know she'd love it. Problem is her brother would refuse to go and then cry because she got something he didn't. I'm trying to plan an equivalent day out together for him but she's likely to want to do that too, unless I choose something that's so rough and tumble that she'd rather stay home.
So, I'm stuck. I didn't set out to be sexist, it just happened!