Michael March interviews Irvine Welsh in the Guardian before this year's Vienna Writers' Festival:

MM: According to Roberto Calasso, 'loss proceeds presence. Every image must abide by this rule'. What about the loss of hair?
IW: To lose a few hairs is careless, to lose the lot is truly a blessing.
MM: For Hannah Arendt, 'mercy insists on inequality'. Do you feel equal to the task?
IW: Yes, mercifully.
MM: Martin Heidegger said: 'The light of the public obscures everything.' Does this confirm 'the unbearable lightness of being'?
IW: I never really got on with Heidegger, although probably shouldn't say that as I'm headed to Vienna. Sometimes I think the light of the public illuminates what might be better kept hidden.

I'm not sure whether to shave my head or not, but will definately skip Vienna.  ¶ 5:20 PM