This is an odd one, as I've not met him myself, but I'm intrigued...
Has anyone met Paul Merton?
He seems an odd character. I watch him on HIGNFY and he seems at times to be disinterested. There seems to be certain guests on the show that he likes (Brian Blessed, Reginald D Hunter) and others that he just switches off from. There's the famous clip of him telling Robert Kilroy Silk to "shut the f*** up" repeatedly.
When he looks blank like that, I really think he's just trying to think up jokes.