I've often read how people shape their image on social media in order to appeal to a certain demographic, or a particular social strata, or to construct a desired persona for one's peers. And I've always thought - well no-one could accuse me of that. I blab out the sorts of things which other people find best not talked about, and I write when the Black dogs on my shoulder and when I'm going to take over the world, and show little embarrassment for either. Yet, I have never written as myself in my life. I don't mean that I've hidden things. It's just that one is always constrained:by editors, by "policy", by the body which pays out, by the institution to which one belongs. Because then, overshadowing all, come the kids. At first you worry about the other mums'n'dads - will they still let their kids come over on play dates if they ever read about me bonking on the Prime Minister's desk? Then it's "Will the kids be sc