Twenty is a tough age because it slips past in the middle of so much else - university, gap year, leaving home, getting jobs.

No 13-year-old or over should ever be seen in trousers that finish above the ankle. It doesn't matter how good your legs are, or if you're on a beach in Bermuda where they invented the things.

This is the trouble with cheating: there are no acceptable rules, or laws. It could be a smile, or dancing to a song that you considered to be indefinably 'ours'. It can feel like cheating to go to a restaurant that you used to go to with someone else. Keeping photographs of exes can infuriate, like retrospective cheating.

If you're bored, it's because someone else is fulfilling his dream. Become a bore. It's the most interesting thing you'll ever do.

And learn to tie a bow - it's not difficult and there's no excuse for either a clip-on or the hideous Hollywood straight tie.

I've often been accused of dressing too well. I've always been fascinated by fashion, though I don't think I'm particularly fashionable.

My only piece of advice is that all of you consider every single text and Snapchat that you ever make as also being shared with your partner, because they all check your phones all the time - trust me on this one.

The Creation Museum isn't really a museum at all. It's an argument. It's not even an argument. It's the ammunition for an argument. It is the Word made into bullets. An armory of righteous revisionism.