Sitting opposite Ed Sheeran in a Dublin hotel room, it's hard to believe he is a 20-year-old still enjoying only his first months as a certified pop star.
In the course of our chat he explains exactly why 'selling out' is a bad idea, defines his vision for success and -- helpfully -- provides a world-weary explanation of how music reviews work. But first he tells me about being interviewed.
"It's starting to become enjoyable. When I first started out I was doing the lower rungs of the press and it was just people quoting my Wikipedia at me and I'd just nod and say yes. These days people have actually done their research," he says, perhaps providing a subtle hint.