I can't speak for him, but I took it to mean the picture must have been drawn quite a while ago, and by asking how your age he was implying that you must be quite old.
(
Mu Dinofiddler,
Fri 24 Jun 2011, 20:14,
archived)
That's how I read it, too.And proof above proves that he's a GRUMPY OLD FART!
And incredibly talented grumpy old fart but a grumpy old fart nonetheless.
(And incredibly talented grumpy old fart but a grumpy old fart nonetheless.
Ratsta,
Sat 25 Jun 2011, 0:09,
archived)