I do not know the answer to that but I have off late gave some thought to answering another question which has surely crossed the mind of any long term fan of the television series Doctor who;Who On Earth Is Tom Baker? And like the first question perhaps it is best left unanswered. Why take the Baker out of Baker anymore than the Who out of Who. Except to the rational mind it might occur that one is a fictional character whilst the other is a Liverpudlian actor of infinite charm. Tom baker's biography Who On Earth Is Tom Baker attempts to answer that very question and what a bitter sweet series of possible answers are given to this Galifreyan riddle. It is a wonderful book. One of the most honest and rewarding autobiographys I have ever read. It is really quite unlike any other I have ever read and I suspect it will always remain so. No one else would ever be so tough on themselves. If you are so inclined treat yourself to a copy of Tom baker reading his own book. It is laugh out loud funny in places and completely heartbreaking in others. The writer so reveals himself to be utterly human after all. Not an alien at all. Mister Baker's editors must have had a few eye popping moments the first time they read through the original text. It is a joy and you will love him all the more when you get to the end and the darkly playful coda that draws a conclusion to the book.
Found this old comic strip from back in the day. From an old Shiver and Shake annual(there is no credit for the writer or artist or I would mention them accordingly). This was from a time when you only had to pop on a floppy old hat and a long scarf and everyone in the world knew who you were pretending to be. Such was the cultural impact of Tom Baker's Doctor in the UK. An almost instant cultural icon. I had a go myself with a mix of old clothes our neighbours were kind enough to donate to the Coney kids jumble. Such was the genorosity of the times and the random nature of second hand clothes. I did not have a sonic screwdriver but I did have an old cake whisk which I liberated from a bin in Etna Drive alleyway. I never even had to mimic the sound of the sonic in action, the whisk turn key on the side did that. I never opened a door with it but I did diffuse a Silurian Viral Bomb in the grounds of the old egg factory.
Saved the world I did.
As an adult human being it is not something I indulge in much. I do believe I have quite lost the knack of it. Although I am still quite a dab hand with a whisk.
Its all in the wrist action you know.