I don't read 'genre' fiction if that means novels with lots of killing and shooting. Even Cormac McCarthy's 'No Country for Old Men' seemed pretty childish in that regard.
For kids like me, being called childish can be a frequent occurrence. Every time we make irrational demands, exhibit irresponsible behavior, or display any other signs of being normal American citizens, we are called childish.
At 35, I'm definitely starting to feel more like a grown-up than I ever have. There's nothing in my life that is childish or whimsical. Having fun is fantastic and I never want to lose a sense of that - and also, I think, you have to have that to put into your work or else it's going to feel stiff.
I got quite cross when I heard about Emma Thompson adapting 'Sense and Sensibility.' It was absolutely childish of me, but I thought, 'I should be doing that. They didn't even ask me.' Some mistake, surely.
The traits the word 'childish' addresses are seen so often in adults that we should abolish this age-discriminatory word when it comes to criticizing behavior associated with irresponsibility and irrational thinking.